Utility knife blade Proline 31003 — single replacement blade for utility/box cutter

Proline 31003 replacement blade is a single utility/box cutter blade intended for general-purpose cutting tasks. Supplied individually, the blade fits standard utility knives and disposable cutters that accept replaceable single-edge blades. It is suitable for cutting cardboard, paper, plastic and other light materials in workshop, packaging and everyday applications.

Advantages

The Proline blade offers a precise straight cutting edge and consistent thickness for controlled cuts. Its single-edge design allows safe, simple installation and removal in compatible utility knives. Supplied individually, this replacement blade provides an economical option when only a single spare is required. The blade’s geometry balances sharpness and durability for routine trimming and slicing tasks.

Suitable for

• Cutting cardboard and corrugated boxes
• Trimming paper and thin plastic sheets
• Opening packaging and tape
• Light workshop and craft cutting tasks
• Replacing worn blades in standard utility/box cutters

Key specifications

• Blade type: single replacement blade for utility/box cutter
• Material: high-carbon steel (typical for utility blades)
• Edge: single straight cutting edge
• Thickness options: nominally 0.5 mm and 0.4 mm depending on blade portion
• Compatibility: fits standard utility knives that accept replaceable disposable blades

How to use

Ensure the utility knife is compatible with single replacement blades before attempting installation. Retract the knife’s blade holder and remove any old blade safely using pliers or the knife’s removal feature. Insert the Proline 31003 blade into the holder with the cutting edge oriented away from your body, seat it firmly and lock the holder according to the knife manufacturer’s instructions. Extend the blade only as much as needed for the task and always cut away from yourself. After use, retract the blade fully and store spare blades in their original packaging or a designated blade dispenser to avoid accidental injury.

Usage recommendations

For consistent performance, replace the blade at the first sign of dulling or chipping. Use appropriate personal protective equipment such as cut-resistant gloves when changing blades, and dispose of used blades in a puncture-resistant container. Avoid using the blade on hardened materials or metal to prolong its service life.