The standard size of a hook blade is 51mm long. An "extra wide" hook blade is 55mm long to be able to cut extra thick carpets. Read Sollex tips!
This Stanley Quick Change Retractable Knife 2-pack is ideal for the DIYer for most common cutting applications. The blade has an integrated string
Quick Change Retractable Utility Knife (2-pack)
Stanley Quick-Change Retractable Blade Utility Knives Knife with Blades Included (3-Piece) 10-499 - The Home Depot
Stanley STHT10479-0 Retractable Blade Utility Knife –
Best Utility Knife
OLYMPIA 8 in. Premium Utility Hook Knife 88-649-220 - The Home Depot
STANLEY® FATMAX® Xtreme Twin Blade Retractable Knives
Kobalt Carbon Steel Hook Utility Razor Blade(5-Pack) in the Replacement Utility Blades department at
Replacement Utility Knife Blades, .025 in, Hook, Crescent/Wiss Replacement Utility Knife Blades , Wt.: 0.03 lb, No. of Cutting Edges: 2, Blade Length
Wiss RWK16V Utility Hook Blade 0.025, 5/Pack
Stanley 11-983 Large Hook Blades, Pack of 5(Pack of 5) : Tools & Home Improvement
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Stanley Bostitch Twin Blade Utility Knife
Easily change blades without losing excess time with the 6-5/8 In. INSTANTCHANGE retractable knife. With a simple click of a button, you can switch out blades without needing any additional tools and get right back to working. The knife's sturdy, durable construction delivers high endurance while its comfortable grip offers and optimized user experience. Includes (3) heavy-duty blades.
Stanley Knife, Utility, InstantChange Retractable