Safety Utility Knife Donau 30873 — retractable black trapezoid blade

Donau 30873 is a safety utility knife with a retractable black trapezoid blade designed for controlled cutting in office, workshop and packaging environments. The knife features a compact housing with a mechanism to fully retract the blade when not in use, reducing exposure and lowering the risk of accidental cuts. Its trapezoid blade profile provides a sturdy cutting edge suitable for a wide range of materials while the retractable function supports safer storage.

Advantages

The retractable blade mechanism minimizes user exposure to the cutting edge and provides quick, tool-free blade retraction. The trapezoid blade shape offers strength at the tip and a broad cutting edge for tasks such as opening boxes and trimming materials. The compact housing is easy to handle and store, and the black finish on the blade helps reduce glare and makes the edge visually distinct during use.

Suitable for

• Opening and breaking down cardboard boxes and packaging
• Cutting paper, tape and thin plastics
• Workshop tasks that require a controlled utility cutter
• General office use for mailroom and supply handling

Key specifications

• Blade type: trapezoid (trapezium) replaceable blade
• Blade finish: black-coated edge
• Operation: manual retractable blade mechanism
• Body: compact handheld housing designed for grip and control
• Intended materials: cardboard, paper, tape, thin plastics and similar packaging materials

How to use

Hold the knife by its housing with the blade retracted until ready to cut. Slide or push the retract mechanism to extend the blade to the required length, keeping fingers clear of the cutting path. Make controlled strokes through the material using steady pressure; extend only as much blade as needed for the task. After use, fully retract the blade into the housing and store the knife in a safe place out of reach of children. Replace the blade according to wear and follow standard safety precautions when changing blades.

Usage recommendations

Use the Donau safety utility knife for light to medium cutting tasks and avoid cutting hard or frozen materials that may damage the blade. Replace dull blades promptly to maintain cutting efficiency and reduce the need for excessive pressure. Always retract the blade when the tool is not in use and store it in a designated tool area to maintain workplace safety.