Bordo 1/2" Reduced Shank HSS Drill Bits - Metric Size:22.5mm 3x Hollow Ground Straight Sided

3x Hollow Ground Straight Sided Slotted Bits (size indicates width of blade): 3/16"

Grip 36 (144163-3)

crimping of wire end ferrules

End B Joint Type

Bordo 1/2" Reduced Shank HSS Drill Bits - Metric Size:22.5mm 3x Hollow Ground Straight SidedOverview 118 notched point 30 helix Flute Length: 89mm Overall Length: 152mm 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. Specifications Part no. Diameter (mm) Flute Length