Feature: 1. [45 STEEL BIT] The spiral cutter is made of 45 steel high pressure forging, which has high impact resistance. 2. [DIAMOND BLADE] The diamond blade has good wear resistance, sharpness and durability, and does not stick to the knife. 3. [FAST CUTTING] The spiral cutting bit has fast cutting speed, is not easy to be blocked, and is efficient and labor saving. 4. [1/2IN SHANK] With 1/2in shank, suitable for all automatic CNC equipments with a 12.7mm (1/2in) shank diameter. 5. [APPLICABLE MATERIALS] Used for processing various hard solid wood materials such as MDF, particle board, paint board, plexiglass, etc. Specification: Item Type: Spiral Carving Cutter Blade Material: Diamond Shank Material: 45 steel Product Model: 1/2 x 12 x H25 x 1-1Z Shank Diameter: 1/2in (12.7mm) Blade Diameter: Approx. 12mm / 0.5in Cutting Thickness: Approx. 25mm / 1in Style: 1+1 Application: Processing of MDF, particle board, paint board, plexiglass, various hard solid wood materials, etc. Suitable for all fully automated CNC equipment with 12.7mm shank diameter . Package List: 1 x Spiral Carving Cutter Note: 1. Applicable shank diameter 12.7mm(1/2in)2. Pay attention to the incisive blade