ITEM NAME:4 pcs HSS Power Groove Countersink Hex Shank Tapered Drill Bits Set B4E9 4 pcs HSS Power Groove Countersink Hex Shank Tapered Drill Bits Set B4E9 4 Pcs set includes bits for drilling pilot holes for screw sizes #6,#10,#13 ,#16. Function: can drill the screw holes and keep on the same axis, after screw in screw nut below the board! Apply to with a clamp or joint drilling machine, suitable for drilling in the hard wood and wood floor, machine screw for wood screw. Material: HSS Drill 4241. Black chamfer drill body material: steel 45. Shank: 2.5mm dia hex shank. Model/The corresponding bit size: #6: 3mm #10: 3.5mm #13: 4mm #16: 4.5mm Package includes: 4 x drill bits Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.
