6PCS Wood Hole Countersink Drill Bit Set Drill Bit Timber Wood Working Drill Bits for Wood Screw Cutter with Hex Key Wrench

6 piece Countersink bit set is the perfect addition to any woodworkers's tool box.  Feature:  High speed heat treated steel,  Suitable for all kinds of wood drilling operations, Single twist design for smooth drilling,  Compatible with drilling machines with chuck, for drilling in wood or wood flooring. Bit sizes:  2.8 x 8mm, 2.8 x 10mm, 3 x 8mm, 3 x 10mm, 3.2 x 8mm, 3.2 x 10mm Package Included: 6 Countersinks + 6 Allen Wrenchs  Warm Tips: - Use low speed when drilling (usually keep in 2000r/min - 3000r/min). Too fast speed will off center, break the bit or jammed - When drilling the hole, please adjust according to the hardness of the wood. If the wood is soft, you can choose the smaller center drill bit. If the wood is hard, you can choose the corresponding or bigger one - If you can't get the center drill bit out after drilling, use the hex key to separate the drill bit