Item No.: P09Y137

.This set replaces 44 individual drill bits.

.The two-flute design gives you faster, smoother cutting. 3-sided (TRI-FLAT)shank will not slip in your drill's chuck.

.SELF STARTING - No need for a pilot hole. Automatically deburrs holes as you drill;

.Long Life True 4241 high speed steel.

.Apply to with a clamp or joint drilling machine, suitable for drilling in the hardwood and wood floor, machine screw for the wood screw.

.Includes： # 1: 4-12(5 Step）：4-6-8-10-12mm; # 2: 4-12（9 Step）:4-5-6-7-8-9-10-12-12mm; # 3: 6-18（7 Step）：6-8-10-12-14-16-18mm; # 4: 4-22(10 Step) ：4-6-8-10-12-14-16-18-20-22mm; # 5: 6-35(13 Step): 6-8-10-13-16-19-21-23-26-29-31-33-35mm.