Description:5pc Heavy Duty Industrial Countersink Drill BIT Tool SET Woodworking Professional ToolsCut Quickly and Easily in Soft Metal， Wood， Rubber， Plastic and Other Machinable MaterialsUse on wood， most metals， plastic and other materialscarpentry， locksmiths， automotive， metal workingperfectly centered holes every time properly seated screw headsThis high speed countersink has a 5 flute rose pattern for chatter free countersinking on steel， brass， aluminum， plastic， wood， and other materials.It is made of high-speed steel with five flutes.Feature:Material:High Speed Steel5 Flutes1/4" dia Shank For Easy GripShank Diam: 1/4 inPackage included:5pcs Countersink Bit