Dark Side Blades Chopper Spring Assisted Biker Knife. The wheel spins freely when you deploy the blade. Specifications: 4.75" CLOSED Black stainless steel blade Black and blue aluminum handle metal wheel(s) on handle. Specifications Overall Length: 7.8 Inches Blade Length: 3.3 Inches Closed Length: 4.75 Inches Blade Material: 440 Stainless Steel Blade Thickness: 3mm Sharpness & Functionality: Very Sharp, Great Carry Blade for Cutting Blade Features: Forward Swept Profile, Silver Flame Print, Hole Cutout Handle: Aluminum Alloy, 3D Motorcycle Motif Finish: Black Powder Coat, Blue Anodized, Silver Print