Marbig Heavy Duty Cutter Knife 18mm – Wheel Lock, 2 Spare Blades Included
Marbig Heavy Duty Cutter Knife (975165B) is an 18mm snap-off blade utility knife with a wheel-lock slider, supplied with 2 spare blades. It's built for cutting cardboard cartons, packaging tape and similar materials in offices, retail stockrooms and warehouses.
Compatibility & Best Use
This is the heavy duty, 18mm blade version in Marbig's cutter knife range — not the narrower medium-duty model. Reach for it when you're opening stock deliveries, breaking down cartons, cutting packaging tape or trimming thicker card and plastic strapping. For fine, precision cuts on paper or thin card, Marbig's medium-duty cutter (9mm blade) is the better fit.
Specs
- Blade: 18mm (W) x 110mm (L) heavy duty snap-off blade
- Cartridge/blade type: segmented snap-off steel blade
- Lock type: wheel lock slider, locks the blade extension in place during use
- Spare blades: 2 included in the pack
- Handle: fluoro orange with black grip housing
- SKU: 975165B | Brand: Marbig
What's Included
- 1 x Marbig Heavy Duty Cutter Knife (18mm)
- 2 x spare snap-off blades
Why It's the Right Pick
The auto-lock snap-off mechanism means each blade segment locks in place as it's snapped away, so you're never cutting on a loose or wobbling edge. The wheel lock adds a second layer of control, holding the blade at your chosen length mid-cut instead of retracting on you. With 2 spare blades already in the box, you get several blade changes before you need to buy refills.
What size blade does the Marbig Heavy Duty Cutter Knife use?
An 18mm wide, 110mm long snap-off blade — the wider "heavy duty" blade in Marbig's range, built for cartons and packaging.
How many spare blades come with it?
2 spare blades are included, plus the one already loaded in the knife.
What's the difference between the wheel lock and the snap-off auto-lock?
The wheel lock is a slider that locks the blade at a set length during cutting. The auto-lock snap-off feature locks each blade segment in place as you snap it off, so it doesn't shift during a blade change.
What's this cutter knife used for?
Cardboard cartons, packaging tape, plastic strapping and similar heavier materials — ideal for unpacking stock or preparing dispatch.
Is this the same as Marbig's medium cutter knife?
No. This is the heavy duty, 18mm blade version. Marbig's medium cutter knife uses a narrower 9mm blade for lighter, more precise cuts.
Does the blade retract fully into the handle when not in use?
The wheel lock slides the blade in and locks it at your chosen length. We haven't confirmed from Marbig's documentation whether it seats fully flush when retracted.
Are replacement blades sold separately?
Marbig sells separate packs of spare 18mm snap-off blades. Check blade width matches before ordering refills.
Is it safe to use in a busy office or warehouse?
Yes — the auto-lock snap-off segments and wheel lock both help prevent a loose or sliding blade during use.
