Tool-free blade changes
An oversized thumb wheel opens the knife for blade replacement or reversal without a separate tool.
CASTLEROCK TOOLS
Heavy-duty fixed-blade utility knife
A heavy-duty utility knife for roofing, flooring and general construction, with tool-free blade changes, a magnetic blade holder and an included belt holster.

The AP-NF05 is listed for roofing felt, asphalt shingles, vinyl flooring, carpet, drywall, insulation and other common jobsite materials.
Its thumb-wheel mechanism supports tool-free blade changes, while the magnetic holder helps keep the blade positioned during replacement.
An oversized thumb wheel opens the knife for blade replacement or reversal without a separate tool.
The integrated magnetic holder helps keep the blade positioned during installation and replacement.
A protective belt holster keeps the knife covered and within reach while moving around the jobsite.

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