Description: 【Adjustable Depth】: Countersink drill bit with adjustable depth stop, hex socket screw fixed slot, is easy to adjust, clear scale for accurate countersink limit. 【Material】: The countersink drill bit set adopts an aluminum alloy body and alloy drill bit, high strength, wear resistant, and ensures a long time to use. 【Quick Release】: Countersink drill bit set, 2 way quick release, can be used for countersinking and screwing. After the drill bit is countersunk, the bit can be directly converted to a screwdriver bit. 【Easy to Use】: Countersink drill bit woodworking tool, suitable for hard wood, can effectively prevent chip accumulation. Replaceable drill bit, quick replacement. Only supports double headed hex screwdriver bits, not support bits that an end is hex and the other end is round. 【Wide Application】: The countersink drill bit is suitable for bench drill, hand drill, electric drill, etc. Size Chart:Total length 14.5cm/5.71inch, aluminum alloy body 9cm/3.54inch, hex screwdriver bit: length 6.5cm/2.56inch, dia. 6mm/0.24inch; center drill: length 6cm/2.36inch, dia. 2.8mm/0.11inch, countersink dia. 8mm/0.31inch Package Includes: 1 Countersink Drill Bit Set