1/2" reduced shank drill

1/2" reduced shank drill material:hign speed steel processing:roll forged,edge ground,milled,fully ground

1/2" reduced shank drill

point angle:118°or 135°

surface finished:bright, black oxide,tin coated,nitrogen or rainbow

*hot fully ground flute with special heat treatment gives advanced throughness with incresed durability of the drill bit

*economic hign speed steel bit general drilling

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

1/2" reduced shank drill