Utility knife Topex 17B191 with 18 mm snap-off blade

The Topex 17B191 utility knife with an 18 mm snap-off blade is a compact cutting tool designed for everyday workshop, hobby and professional tasks. Its segmented blade design allows users to quickly refresh the cutting edge by snapping off a worn segment, maintaining a sharp edge without full blade replacement. The knife is suitable for straight cuts in materials such as cardboard, film, carpet edging and thin panel materials, offering controlled cutting for packing, trimming and light construction work.

Advantages

The replaceable 18 mm segmented blade reduces downtime by enabling rapid restoration of the cutting edge. The knife’s compact body and blade locking mechanism provide stable, repeatable cuts and improved user control. The construction balances durability and ease of use, and blade segments deliver consistent sharpness for repetitive tasks. The tool’s design simplifies blade changes and is compatible with standard 18 mm snap-off blades.

Suitable for

• Opening and cutting packaging and cardboard
• Trimming vinyl, film and wallpaper
• Cutting carpet edges and thin floor materials
• Precision trimming in crafts, model making and DIY projects
• Light-duty construction and installation tasks

Key specifications

• Blade type: 18 mm segmented snap-off blade for staged renewal of the cutting edge
• Use: general-purpose cutting for packaging, crafts and light construction
• Body: compact handheld format designed for one-handed operation
• Blade change: tool supports quick blade replacement and segment snapping
• Cutting control: integrated locking mechanism for secure blade position during use

How to use

Extend the blade to the required length and lock it in place before cutting. Make steady, even passes with controlled pressure; avoid forcing the blade through thicker materials to minimise wear and reduce the risk of slipping. When the blade edge becomes dull, snap off the used segment along the scored line to expose a fresh edge, or replace the blade entirely according to manufacturer guidance. Store the knife with the blade retracted and locked when not in use.

Usage recommendations

For safe operation, always keep hands clear of the cutting line, wear appropriate hand protection when handling tougher materials, and use a cutting surface or mat to protect work surfaces and prolong blade life. Replace blades with matching 18 mm segmented snap-off blades and ensure the locking mechanism is functioning before each use.