Features 1、Clean in Drilling: Designed to have wide flute, the countersink drill bit can easily drill out clean guide hole to better fit the fixing screw. 2、Premium Hex Shank: Equipped with universal hex shank, the 1/4 x 3.3 counter sink drill can perfectly match the power tools under high speed. 3、Wider Application: The adjustable countersink drill bit can be widely applied to density board, medium fiber board, particle board and so on. 4、Cemented Carbides: Made of premium cemented carbide material, this drill bit that has been through excellent workmanship has great durability. 5、Simple to Install: Comes with a compact size and a light weight as well, the woodworking countersink drill bit is very convenient to install. Specification Item Type: Countersink Drill Bit Material: Cemented Carbide Specification: 1/4 x 3.3 Package List 1 x Countersink Drill Bit 1 x Hex Wrench 1 x Screw 1 x Storage Case