High Precision 8mm to 12.7mm Router Bit Collet Chuck Adapter CNC Tool 8mm to 12.7mm High Precision Router Bit Clamp Description: Adopt high quality carbide material, good flexibility and wear resistance. High precision clamping, waterproof and stable. Made of carbide, processing by heat treatment and precise grinding. Suitable for engraving machine, applicable to different specifications of drill bit tool and chuck Good elasticity and abrasion resistance. High precise clamping force, good gripping stability. Specification: Material: Carbide 6.35mm to 12.7mm: Inner Diameter: 6.35mm/0.25 inch Outer Diameter: 12.7mm/0.49 inch 6mm to 12.7mm: Inner Diameter: 6 mm / 0.23 inch outer diameter: 12.7 mm / 0.49 inch 8 mm to 12.7 mm: inner diameter: 8 mm / 0.31 inch outer diameter: 12.7 mm / 0.49 inch 10 mm to 12.7mm: Inner diameter: 10mm/0.39in Outer diameter: 12.7mm/0.49in 10mm to 12mm: Inner diameter: 10mm/0.39in Outer diameter: 12mm / 0.47 inch 8 mm to 12 mm: Inner diameter: 8 mm / 0.31 inch Outer diameter: 12 mm / 0.47 inch 6.35 mm to 12 mm: Inner diameter: 6.35 mm / 0.25 inch outside diameter: 12mm / 0.47 inch 6mm to 12mm: Inside diameter: 6mm / 0.23 inch outside diameter: 12mm / 0.47 inch 6.35mm to 9.5mm Inside diameter: 6 .35mm / 0.25inch outer diameter: 9.5mm / 0.37inch 6.35mm to 8mm Inner diameter: 6.35mm / 0.25inch outer diameter: 8mm / 0.31inch 6 .35mm to 8mm Inner diameter: 6.35mm / 0.23inch Outer diameter: 8mm / 0.31inch Package includes: 1 Bit Route Bit Chuck Adapter