Ruth's sister 0443C-WH Internal Power Cable White 140mm

Utility Knife for Craft Work

The Ruth's sister 0443C-WH is a precision utility knife built for paper, leather and carton cutting. Its 9 mm stainless steel blade suits hobbyists and light workshop tasks that need a fine, controlled edge. The white metal holder measures 140 mm in total length, 15 mm wide and 12 mm thick. An automatic lock rated to 5 kg keeps the blade fixed during use.

Blade Format and Lock Limit

Only 9 mm by 75 mm snap-off blades fit this holder, so wider or longer segments cannot be used. The triangular grip gives stable leverage but the 5 kg lock rating sets a hard ceiling on downward force. Heavy stock, thick leather stacks or dense cardboard will exceed the mechanism before the blade dulls. The all-metal sheath adds safety but does not extend the force limit.

Capacity and Headroom

The knife cleanly handles single sheets, thin leather and light cartons in one pass. Multi-layer corrugated board or 3 mm vegetable-tanned leather push the lock to its 5 kg ceiling and risk slip. Blade changes are tool-free, yet the 75 mm segment length means fewer fresh edges per cartridge than wider knives. Users needing continuous heavy cutting will outgrow this format quickly.