Utility Knife Top Tools 17B528-12 — 18 mm snap-off blade, metal/plastic handle

The Top Tools 17B528-12 utility knife features an 18 mm snap-off blade designed for precise cutting of cardboard, plastic, carpet and similar materials. The sectional blade system allows users to break off dull segments to quickly reveal a fresh cutting edge without replacing the entire blade. The compact body combines metal reinforcement and a molded plastic outer shell to balance durability with comfortable handling during repetitive tasks in workshops, on construction sites or for general packaging and DIY work.

Advantages

The metal/plastic construction delivers a rigid core for strength while the plastic exterior reduces weight and improves grip. The 18 mm snap-off blade accepts standard sectional blades for convenient maintenance and longer usable life. A blade slider mechanism enables controlled blade extension and retraction for safer storage and transport. The knife’s compact profile and ergonomic contour support accurate cutting and reduce hand fatigue during extended use.

Suitable for

• Cutting cardboard and corrugated boxes
• Trimming plastic sheeting and film
• Cutting carpet, linoleum and flooring materials
• Packaging, opening boxes and cutting tape
• General workshop and DIY tasks requiring a replaceable-edge utility blade

Key specifications

• Blade type: 18 mm snap-off sectional blade
• Handle construction: metal reinforced core with plastic outer shell
• Blade change/segment system: break-off sections for renewed edge
• Blade control: manual slider for extension and retraction
• Form factor: compact, ergonomic profile for one-handed use

How to use

Extend the blade to the required length using the slider and lock it in place if the handle provides a locking position. Make controlled cuts by applying steady pressure and guiding the knife along the cutting line; for thick materials use several shallow passes rather than a single deep cut. When the tip becomes dull, snap off the used blade segment along the scored line using the built-in snapper or a suitable breaking tool, then retract the blade for storage. Replace the entire blade strip when all segments are exhausted following manufacturer safety guidance.

Usage recommendations

Use appropriate personal protective equipment such as cut-resistant gloves and eye protection when cutting. Keep the blade retracted when not in use and store the knife away from children. Inspect the metal/plastic handle regularly for damage and replace the knife if the slider or blade retention mechanism becomes unreliable.