Dovetail bits, two flutes, 6.35mm(1/4") shank with bearing guide mounted on the shank. Black Router Bit - Cutting Angle: 10°; Cutting Length: 12.7mm( 1/2"); Cutting Depth: 12.7mm( 1/2"); Overall Length: 59mm(2-5/16"); Yellow Router Bit - Cutting Length: 15.9mm(5/8"); Cutting Depth: 15.9mm(5/8"); Total Length: 63.5mm(2-1/2"); Compatible with common dovetail jigs, fence systems or CNC routers. Cuts all composite materials, plywood, hardwood and softwood. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.