Four-hollow square SDS Drill Bits

Detailed Product Description

1.  We could produce according to customer's requirements based on standards: DIN8035, ANSI B212.15-1994, GB/T6335.1-1996, ISO5468 etc;
2.  Using special high quality carbide tip, and 40Cr or better material for body;
3.  Heat-treatment: auto net belt stove handling equipment, could meet strictly torsion test;
4.  Flute type L, U, W  etc produced by CNC machine, high function self-protection tip welding system guarantee reliable & stable welding quality;
5.  Surface treatment: Sand-washed, electrophoresis etc, could drill holes on cement, block, granite, and other stone with hammer drills.