STANLEY FATMAX 0-10-421 Snap-Off Blade Knife, 18 mm, Die-Cast Metal Body, Slide Lock, Stainless Steel Blade Carrier, Pocket Clip, Yellow

The Stanley 0-10-421 utility knife blade is a replacement blade designed for general-purpose cutting tasks. With a width of 77 mm, depth of 21 mm and overall height of 205 mm, this blade assembly provides a balanced profile for controlled, straight cuts. Weighing 134 g, it is compact and straightforward to handle, offering consistent edge performance for trimming, scoring and slicing a variety of materials commonly encountered in construction, packaging and workshop environments.

Advantages

The blade assembly combines a sturdy construction with a precise cutting edge to deliver repeatable results. Its dimensions give a stable cutting footprint and the weight supports steady handling without excess bulk. The component is compatible with typical utility knife housings and is intended to retain sharpness across multiple cuts, reducing the need for frequent blade changes during routine tasks.

Suitable for

• Cutting cardboard and packaging materials
• Trimming drywall paper and single-layer gypsum board
• Scoring and cutting vinyl, linoleum and floor coverings
• Light carpentry tasks such as trimming veneer or softwoods
• Workshop and general maintenance use

Key specifications

• Overall height: 205 mm
• Blade width: 77 mm
• Blade depth/thickness: 21 mm
• Weight: 134 g
• Design: straight utility blade profile suitable for standard utility knife housings

How to use

Install the blade into a compatible Stanley or universal utility knife housing following the knife manufacturer’s instructions for secure fitting. Ensure the cutting edge faces away from your body and lock the blade in the extended position required for the task. Use steady, controlled strokes and allow the blade to perform the cut rather than forcing excessive pressure. Replace the blade when you notice reduced cutting performance or visible wear on the edge.

Recommendations

For safe operation, always wear appropriate hand protection and cut on a stable surface or cutting mat. Keep the blade covered or retracted when not in use and dispose of used blades in a designated sharps or blade disposal container. Choose the correct blade exposure for the material being cut to minimize risk and improve edge life.