5.8x160mm four-groove non-falling nail drill and lock set (AE158H(P))

• Can drill holes in cement walls, aluminum doors and windows, corrugated boards and other building materials, and load and remove screws
• The sleeve is designed with steel balls, which can fix screws without losing nails. It is stable, safe and durable.
• Four-groove, three-edge drill bit for rebar drilling, tungsten steel head, made of hard material, which can maximize drilling speed and wear resistance.
• Easy installation, free conversion, saving time and effort in operation
• The assembly includes 2 cement drill tails and 1 sleeve
• Suitable for four-groove power-free electric drills

Material:
- Sleeve: alloy steel
- Drill bit:: HSS+tungsten steel 

Product components:
- 2 pieces of four-groove and three-blade drills that can pass through reinforced concrete drill tails 5.8x160mm
- 1 casing 120mm