All ProductsBrowse every BLASTBAG, liner, plug, inflator and tool MTi makes — 400+ field-tested SKUs.106
BLASTBAGS™Inflatable stemming bags — Solo, Aero, Evo and Bag Spider. Cut powder use and improve fragmentation.5
Blasthole LinerBLASTSHIELD™ PLUS and Heavy-Duty Poly liners — keep emulsion dry in wet, fractured ground.2
Blasting Machines & Initiation EquipmentHB-series electric and non-electric blasting machines — MSHA-approved, with circuit continuity.14
Collar / Hole ProtectionCOLLARCONE hole savers and foam cubes — stop collar collapse, debris fall-in and redrills.8
Delineation & MarkingPINTAGs, solar flashers, stake flags and bandanas — mark, flag and light up the bench.6
Electrical Measurement DevicesDigital ohmmeters and circuit continuity testers — verify your shot before you fire.2
In-Hole AccessoriesSLUMPSTOPPA brushes, multifit spiders, booster locks and shot bags — for reliable, well-loaded holes.5
Inflation EquipmentInflators, droplines, couplings, hose reels and repair kits — full setup for chemical or air inflation.7
Locks / StoragePadlocks, load locks, steering locks and bin skirts — secure magazines, vehicles and gear.4
LoadingLoad poles, C-hooks, barbed retrievers, tamping plugs and adaptors — everything to deck and prime.7
MeasuringMiTiMEASURE tapes, dip weights, laser hypsometers and GPS — drill depth, dip and field measurement.8
SafetyHi-vis vests, fall protection, earplugs, lightning detectors and first-aid — keep your crew safe on the bench.21
Signs/PlacardsDanger, Keep Out and Explosives warning signs plus DOT placards — adhesive, aluminum and magnetic.4
Stemming PlugsROCKRIVET, MITIPLUG, SPRINGLOCK and MARS — friction stemming plugs that lock the deck and hold the gas.6
ToolsCordcutters, shot firer mirrors, blasthole cameras, MITI hooks and clips, smoke dischargers and batteries.20
In-hole accessories are the tools that get lowered into the blast hole during loading — to hold the charge column, seal a breakthrough, center the booster, contain a wet-hole problem, or stop a primer from floating away. They aren't stemming plugs and they aren't measuring tools. They're the accessories that decide whether what happens inside the hole goes textbook or sideways.
This collection covers five product families built to solve five different in-hole problems — from emulsion upholes that won't hold, to cracked ground that won't seat a charge, to a booster that won't stay where you put it.
In-hole accessories are the tools that get lowered into a blast hole during loading to manage what happens inside the hole — sealing breakthroughs, holding charge columns, centering boosters, anchoring primers, or containing product in cracked or wet ground. They're not stemming plugs and they're not measuring tools. They're the supporting kit that decides whether the loaded column behaves the way the shot design intended.
MTi GROUP's range covers five in-hole accessory product families — inflatable plugs, bristle column retainers, fillable polypropylene bags, booster centralizers, and anti-flotation locks. Hole size coverage runs from 2.5 inches (64 mm) through to 8 inches (203 mm), and every product in the collection is non-sparking.
Loading the hole is where the drill plan turns into a real, charged shot — and where most blast problems start.
Each accessory does one job inside the hole. The BLASTBALL™ inflates with compressed air against the hole wall to seal a breakthrough or a wet-hole bottom before the charge goes in. The SLUMPSTOPPA™ uses polymer bristles to hold an emulsion column in place during loading while letting the explosive gas through normally. Shot Bags are empty polypropylene tubes you fill on site with ANFO, emulsion, or stemming material — turning loose product into a contained, weighted unit that holds in cracked or wet ground. MultiFit Spiders center the booster in the explosive column so detonation propagates evenly. Booster Locks anchor the booster against flotation when pumpable explosives or water are present.
Every product in this collection is non-sparking by design — polymer, polyurethane, polypropylene, lead, or copper alloy. Nothing in the hole is steel. Tools loaded with or near live explosives have to meet non-sparking standards (OSHA 1910.109), and these accessories are built to that bar without compromise.
 SLUMPSTOPPA™
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 Shot Bags
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 BLASTBALL™
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 Spiders
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 Booster Lock
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| What It Does In the Hole | Holds the emulsion column in upholes during loading while letting gas through | Fillable polypropylene tube — ANFO, emulsion, or stemming material goes in on site | Seals against the hole wall to block a breakthrough, cap an uphole, or contain a cracked/wet hole | Centers the booster in the explosive column so detonation propagates evenly | Anchors the booster against flotation when pumpable explosives or water are present |
| Hole Size Range | 2.5" – 4.5" / 64 – 115 mm | 3" – 8" diameter, 36" – 48" length (76 – 203 mm × 914 – 1,219 mm) | 2.5" – 8" / 64 – 203 mm | 2.5" – 4.5" / 64 – 115 mm | 5"+ / 127 mm+ |
| Material | Polymer bristles + stainless steel spine | Polypropylene (poly bag) | Reinforced rubber bladder + nylon webbing | Plastic housing | Polymer (potato-sack design) |
| Power / Mechanism | None — bristles fold on insertion, grip the wall | None — filled on site | Compressed air via drop line, hermetic valve | None — friction legs fold on insertion | None — clips onto booster |
| Best For | Underground emulsion upholes | Wet, cracked, or irregular open-pit holes | Wet holes, breakthroughs, cracks/voids | Booster centralization in production holes | Wet boreholes with pumpable explosives |
Swipe to see all columns →
Pick SLUMPSTOPPA™ when you're loading emulsion into underground upholes and the column won't stay where you put it. Polymer bristles with a stainless steel spine fold on insertion and grip the hole wall — holding the emulsion column in place while the bristles let the gas through normally. Three sizes: 2.5"–3", 3"–4", 4"–4.5" (64–115 mm). The dedicated emulsion-slump solution.
Pick Shot Bags when the hole is wet, cracked, or won't hold a clean column on its own. Empty polypropylene tubes you fill on site with the material the hole needs — ANFO or emulsion to make a bagged charge that won't get diluted by water or lost into cracks, or stemming material (drill cuttings, sand, gravel) to add weight to the column. Eight sizes from 3" × 36" to 8" × 36" (76 – 203 mm × 914 mm). Some sites call them poly bags. Same idea.
Pick BLASTBALL™ when you've got a wet hole, a breakthrough, or cracks and voids that need a reliable seal across an irregular bore. The only inflatable in this collection rated for wet-hole deployment — lower it through water on a drop line, then inflate with compressed air. Reinforced rubber bladder with nylon webbing handles -58°F to 185°F (-50°C to 85°C). Three sizes covering 2.5" to 8" (64 – 203 mm).
Pick a MultiFit Spider when you need the booster centered in the explosive column for even detonation. The spider's flexible legs fold on insertion and extend automatically once it's in the hole, centering the booster and protecting the detonator wire. Two sizes — 150G fits 2.5" – 4.5" holes (64 – 115 mm) and supports lighter boosters; 250G fits the same range and supports heavier boosters. Quick "shotgun-style" load through a 25 ID / 32 OD ANFO hose.
Pick the Booster Lock when you're running pumpable explosives or loading into wet boreholes and the booster wants to float. Clips onto the booster and locks it at the depth you set, so the primer stays where the shot design called for. Fits holes 5" (127 mm) and larger. Simple clip-on design — no inflation, no tools.
Tools that get lowered into the blast hole during loading to manage what happens inside it. Inflatable seals for breakthroughs and wet holes. Bristle retainers for emulsion upholes. Polypropylene bags for cracked ground. Booster centralizers and anti-flotation locks for primer placement. Each one solves a different in-hole problem — and every product in the collection is non-sparking.
In-hole accessories that earn their keep on the bench.
Five product families, five distinct in-hole problems. Emulsion slumping → SLUMPSTOPPA. Wet or cracked holes → BLASTBALL or Shot Bags. Booster off-center → MultiFit Spider. Booster floating → Booster Lock. Match the accessory to the in-hole problem instead of forcing one product to do every job.
Every product is polymer, polyurethane, polypropylene, lead, or copper alloy. No steel near live explosives. Consistent with OSHA 1910.109 — the bar every tool loaded into a hole has to meet. Safety isn't an add-on; it's the baseline spec.
Every product in this collection is a single-use consumable designed to install in seconds. Push, fill, drop, inflate, or clip — the accessory does its job and the shot does the rest. No batteries, no retrieval, no service between cycles. Same-day shipping from Stanton, KY keeps the bench stocked.
BLASTBAGS™ are high-performance gas bags used to create reliable air decks in blastholes, helping reduce explosive consumption and improve fragmentation. These inflatable...
Inflation Equipment is the kit that turns a flat BLASTBAG™ AERO or BLASTBALL™ into a sealed air deck at the bottom of...
Loading is the part of the drill and blast day when the hole gets charged. Pattern's drilled, depths are checked, pre-load work...
