masonry drill bits set
1.chrome plated
2.economical hign speed steel bit for general drilling

  masonry drill bits set

 Size: (1.0 to 10.0) x 0.5mm
 Finish: black, tin-coated, chrome plated, nickle plated etc
 Process: roll forged, edge ground or fully ground
 Packing: plastic box, step plastic box, metal box or round plastic box

*hot fully ground flute with special heat treatment

*black oxide finish for greater resistance to wear

*for drilling in steel,cast steel, malleable iron, sintered metal,non-femous metal