Bordo HSS Metric Reduced Shank Drill Set (4 Piece)
118° notched point 30° helix
1/2" Reduced Shank
DRILL BIT SURFACE TREATMENT
Bordo reduced shank HSS drills are ground and then a black finish is achieved by steam tempering, a thermal process resulting in a porous tool coating. This surface aids chip flow and heat dissipation. The drill is then ground a second time to achieve a bright finish on the shank and cutting edges.
Includes
1 x 16mm
1 x 18mm
1 x 22mm
1 x 25mm