Shaft diameter: 8 mm; Cutting Diameter: 1/2" (12.7mm) Cutting Length: 50mm/63mm/76mm; Total Length: 83mm/95mm/109mm. Ideal for professionals and hobbyists for edging, cutting, texturing and grooving on all woodworking projects Suitable for: It can be used for grooving a variety of materials including solid wood, MDF, chipboard, plywood and more Precise: High quality cutting blades guarantee professional and high precision processing of wood PREMIUM QUALITY: Yellow heat resistant coating prevents the accumulation of sawdust and resin, sharp cutting edges improve work efficiency and product quality 3pcs extra long wood knife with 8mm straight handle Extra long cutter made of high quality YG6 alloy for woodworking < p>PTFE coating is wear and heat resistant. Robust hardened steel housing with anti-kickback design. Create precise, smooth cuts on hardwood, chipboard, MDF and more. High-quality cutters guarantee professional and high-precision woodworking.