1Clean Without Debris: The cutter can cut into the materials smoothly, resulting in clean, no debris, easy to use 2Anti Kickback Design: Rugged hardened 45 steel material body, come with anti kickback design, more stable and reliable 3CNC Ground to 600 Grit: Milling cutter is CNC ground to 600 grit, which is as smooth as a mirror, which improves working efficiency 44 Kinds Cutting Lengths: The router handle size is 8mm, and there are 4 kinds of blade cutting lengths to choose, can meet your different using needs 5Excellent Performance: Finger joint router bits come with stable structure, excellent performance and long service lifeItem Type: Finger Joint Router BitCommodity Material: 45 steelTool Handle Size: Approx. 8mm / 0.3in1 x Finger Joint Router Bit