Westcott Titanium Bonded Hobby Knife With Cushion Grip Handle and #11 Blade Titanium Bonded blades that are 3 times harder than stainless steel, highly resistant to rust and corrosion Ultra durable stays sharper longer and has contoured RibGrip Contoured RibGrip handle provides comfort and control. Safety cap. Acme United Limited Lifetime Warranty.