Trapezoid Utility Knife Irwin model 10504238 with retractable blade

The Irwin trapezoid utility knife model 10504238 with retractable blade is a compact hand tool designed for controlled, general-purpose cutting tasks. It features a trapezoid-shaped blade that offers a broad cutting edge for scoring and slicing, combined with a retractable mechanism that secures the blade when not in use and permits incremental extension for precise cuts. The body provides a comfortable grip and straightforward blade-change access suitable for light workshop work, packaging, crafts, and everyday utility tasks.

Advantages

The retractable blade mechanism reduces accidental exposure and improves storage safety while allowing the user to set blade length for task-specific control. The trapezoid blade geometry delivers a wide cutting surface for straight cuts and increased durability at the tip. The knife’s compact design and simple blade-change process ensure fast maintenance and consistent performance with replaceable blades.

Suitable for

• Opening cardboard boxes and packaging
• Trimming plastic, vinyl or thin laminate materials
• Cutting paper, carpet underlay or foam
• Light workshop tasks and general DIY
• Hobby and craft projects requiring controlled straight cuts

Key specifications

• Blade type: trapezoid utility blade for straight cutting
• Blade action: retractable with adjustable extension
• Body: compact handheld design with grip-friendly profile
• Blade replacement: tool-accessible mechanism for quick blade changes
• Primary use: general-purpose cutting for packaging, trimming and light workshop tasks

How to use

Slide the blade out to the required length using the retractable mechanism to match the thickness of the material and the depth of cut needed. Position the blade against the material and apply steady, controlled pressure while guiding the knife along the cutting line. Retract the blade fully after each use and safely store the knife. Replace the blade when it becomes dull by following the manufacturer’s blade-change steps: ensure the blade is retracted, open the access mechanism, remove the spent blade, and insert a new trapezoid blade before securing the housing.

Usage recommendations

Use personal protective equipment such as cut-resistant gloves and eye protection when cutting. Always retract the blade when not in use and dispose of used blades in an appropriate sharps container or blade-safe disposal unit. For thick or dense materials, use multiple light passes rather than excessive force to maintain control and prolong blade life.