Shaft diameter: 8mm; Cutting diameter: 1/2 inch (12.7mm); Cutting length: 50mm/ 63mm/ 76mm; Total length: 97.5mm/ 110mm/ 123mm. The drill bit is made of cemented carbide for high hardness and long life; The main function is cutting, three-dimensional clearing angle, grooved. Top Bearing Router Bit Set Cuts all compost materials, MDF, solid wood, chipboard, plywood, etc. Double-end cutting design, high concentricity for fast, smooth and precise finishing cuts for laminates and models. Package includes: 3 x extra long router bits.