StratMet 13pcs Cobalt Drill Bit Set M35 HSS Jobber Length

13-Piece Cobalt Drill Bit Set

This StratMet set contains 13 M35 cobalt steel jobber-length bits ranging from 1/16" to 1/4". The 5% cobalt alloy delivers hardness that exceeds standard high-speed steel for drilling stainless steel, alloy steel and cast iron. Each bit features a 135° split point for self-centering starts and spiral flutes that clear chips quickly. The indexed case keeps every size organised and ready for selection.

Check Chuck Capacity and Material Compatibility

Verify that your drill chuck accepts shanks up to 1/4" before ordering. The set is designed for hard metals such as stainless steel and cast iron but also handles copper, aluminium, plastic and wood. Ensure your workpiece and machine setup suit jobber-length geometry and the cutting speeds recommended for cobalt tooling.

Sustained Cutting in Hard Alloys

Under continuous drilling in stainless or alloy steel the M35 cobalt resists heat buildup better than ordinary HSS, maintaining edge life through repeated holes. The 135° split point reduces thrust force, lowering the chance of bit walk or breakage during long sessions. Chip evacuation remains consistent thanks to the precision-ground flute profile.