Deli D780557 Signal Green Retractable Trapezoid Utility Knife

On a busy warehouse floor, breaking down cardboard boxes hour after hour demands a knife that stays sharp, secure, and easy to find. The Deli D780557 utility knife delivers with a high-visibility signal green body and a rugged SK5 steel blade. Its retractable trapezoid blade locks firmly during cuts, while the tool-free quick-change system means less downtime and more productivity.

Key specifications

• Blade type: trapezoid, 18 mm width, 0.5 mm thickness
• Blade material: SK5 carbon steel for long-lasting sharpness
• Handle: ABS plastic with TPR non-slip grip
• Retractable blade with auto-lock slide mechanism
• Tool-free quick blade change
• Includes 1 blade
• Overall length: 160 mm
• Colour: signal green
• Packaging: blister pack

Why choose it

The auto-lock slide keeps the blade securely extended during cuts, reducing the risk of accidental closure. When you need a fresh edge, the quick-change mechanism lets you swap blades without tools, minimising downtime. The TPR grip provides a comfortable, non-slip hold even with gloves or sweaty hands, improving control and safety.

Ideal use cases

• Breaking down cardboard boxes in warehouses and retail stockrooms
• Cutting carpet, vinyl flooring, and underlayment during installation
• Trimming plastic sheeting, rope, and strapping on construction sites
• General-purpose cutting in workshops, garages, and homes

Good to know

Compatible with standard 18 mm trapezoid blades, so replacements are easy to find. The compact 160 mm length fits comfortably in tool belts and pockets. The signal green colour enhances visibility, helping you locate the knife quickly in busy environments.