1/2 reduced shank drill bit material:hign speed steel use: steel, cast steel,malleable iron,sintered metal e

 1/2 reduced shank drill bit *hot fully ground flute with special heat treatment gives advanced throughness with incresed durability of the drill bit

 *heat treated hign speed steel drill bits with 1/2" shank

 *complete with below moulded storage case,for easy transportion

 *specification:14,16,18,19,21,22,24,and 25mm

1/2 reduced shank drill bit