Straight Groove Step Drill Bit Hss Titanium Coated Wood Met

• Length:78mm/67mm/77mm/104mm
• Is_customized:Yes
• Use:Metal Drilling
• Material:High Speed Steel
• Diy Supplies:Woodworking
• Type:Core Drill Bit
• Origin:Mainland China
• Certification:None
• Package 1:1pcs 3-12 Step Drill Bit
• Package 2:1pcs 4-12 Step Drill Bit
• Package 3:1pcs 4-20 Step Drill Bit
• Package 4:1pcs 4-32 Step Drill Bit
• Package 5:3-12 4-12 4-20 3 In 1 Set
• Package 6:4-12 4-20 4-32 3 In 1 Set
• Package 7:4-12 4-20 4-32 3 In 1 Box

Drill Bits is efficient and versatile drilling.Impact-resistant screwdriver head - for high impact and high strength screwdriver, suitable for screwdrivers, especially the impact screwdriver screw deep bite effectively reduce the head slip, greatly improve the work efficiency hardness ≥62hrc - high precision optimized material. The hardness of the drill head is as high as 62HRC, more robust and durable mechanical principle design - strong torque, high torque after contact with the screw head, the collision reaction force is partially absorbed by the torque, effectively preventing the tool head from breaking shock-proof - fast through the metal shock-proof, no rupture, easy to penetrate the metal plate with dovetail nails.Anti-impact screw head -- suitable for high impact, high strength screw head, suitable for impact screw head, especially impact screw head deep bite, effectively reduce head slip, greatly improve work efficiency hardness ≥62hrc -- high-precision optimization material. Drill hardness up to 1783HRC, more durable mechanical principle design - strong torque, high torque after contact with the screw head, collision reaction force part is absorbed by torque, effectively prevent the head from breaking shock-proof - fast through the metal shock-proof, no rupture, easy to penetrate the metal plate with the tenon nail.