Features 1、Rigid Alloy Steel: This countersink drill bit set is made of carbide steel with a hardness of HRC 50 to 54 and the countersink bit offers excellent cutting ability, great durability and good wear resistance. 2、Flexible Adjustment: The countersink drill bit is adjustable for different lengths of screws and creates countersunk holes in the wood, ensuring a consistent depth of countersunk holes and protecting the work surface and debris chamber. 3、Simple Operation: This countersink drill bit makes perfect countersunk holes for flat head screws and plug head screws. Users just use the drill set and enjoy a neat project without splitting the wood. 4、Wide Application: The countersink drill bit is suitable for wood, MDF, particle board, dense plywood, MDF, hardwood, softwood and particleboard. 5、Completed Accessories: There are one countersink drill, one hex wrench, one wrench screw and one storage cylinder. 6、Convenient To Carry: The countersink drill bit set is equipped with a storage bag which is small and light, so it is convenient for users to take the set outdoors. Specification Item Type: Countersink Drill Bit Set Materials: Alloy Steel Size: Approx. 8mm x 8mm x 3.2mm/0.31in x 0.31in x 0.13in Package List 1 x Countersink Hole Drill 1 x Hex Wrench 1 x Wrench 1 x Screw 1 x Storage Tube