Special HI-Molybdenum tool steel. Precision ground: points, flutes, body, clearance, and drill diameter for the ultimate in
accuracy & performance. Body and clearance are gold surface treated for maximum lubricity. Especially designed for hand held drills. Recommended for use in work hardening grades of stainless steel & other hard metal drilling applications.
SPM-13 1/16 to 1/4 by 64ths
RSPM-15 1/16 to 1/2 by 32nds (3/8" shank)
RSPM-29 1/16 to 1/2 bt 64ths (3/8" shank)