Description:Specially designed steel sleeve countersinks or pilot holeAdjustable depth of counter sleeve with Allen wrenchStandard round/hex chuck is compatible with quick change Drills and countersinks for wood screws without bitsDrilling length can be adjusted for screws of different lengths simply by loosening and tightening the set screwSpecification:Color: as pictures showMaterial: HSS 4241 drill bitBlack for drilling and chamfering Body Material: 45 Steel Round Shank Diameter: 1/4" (6.35mm) Sizes #5,#6,#8, #10,#12Ilość: 5pcsPackage Contents:5*Hex Shank Drill Bit + 1*Hex WrenchNote:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.