Electric Hollow Core Drill Bit Shank Round Hammer Hole Opener Adapter Connecting Rod 330mm

1、WEAR RESISTANT MATERIAL: Made of excellent high carbon steel material with heat treated possess high strength surface treated wear resistant to ensure long service life 2、NO EDGE DROP: Combination of round alloy blades each blade bears part of the workload and not easy to drop the edge 3、FIRM WELDING: Adopt high frequency welding technology the welding opening is very firm the inner and outer welding ports are smooth and the appearance of the joint is accurate 4、WIDE USES: Used for the connection of electric hammers and impact drilling equipment and the conversion of water drill hole openers 5、FOR WALL: This electric hollow core drill bit shank can achieve core removal of concrete cement stone wall useful and practical