Item Description:5 PCS Woodworkers Countersink Drill Bit#6 #8 #10 #12 # 14 Counterbore Counter BitFeaturesQuick Change Countersink Set Countersink Drill Bit Set Quick Change Hex ShankCarpentry Countersink Drill Bit Set Woodworking ToolsFour piece set includes bits for drilling pilot holes for screw sizes 6#,#8,#10,#12 and #14. designed steel counter sleeve countersinks or counter bores pilot hole.SpecificationsColor:As the picture shownBit material: 4241 (titanium plating)Drill chamfering machine: No.45 steelShank : 1/4Bit size :6# 2.38mm8# 2.78mm10# 3.175mm12# 3.56mm14# 3.97mmPackage included:5 x Countersink Drill Bits1 x Hex WrenchItem Specification:Type: Countersink Drill BitDIY Supplies: Woodworkinglength: otherUse: Wood DrillingMaterial: High Speed SteelDrill chamfering machine: No.45 steelShank: 1/4