DeWalt 13pcs M35 Cobalt Drill Bit Set 1/16-1/4in

13-piece M35 cobalt drill bit set

This DeWalt set contains 13 M35 cobalt steel drill bits ranging from 1/16 inch to 1/4 inch. The 5 percent cobalt alloy gives each bit hardness that exceeds standard high-speed steel. Bits are organised in an indexed storage case for quick selection. It suits trade professionals and serious DIY users who drill hardened metal regularly.

135-degree split-point geometry under load

The 135-degree split-point tip centres itself on contact and reduces wandering when pressure is sustained. Precision-ground spiral flutes evacuate chips continuously so the cutting edges stay clear during deep holes. This geometry resists the heat build-up that causes ordinary bits to bind or snap in stainless steel, alloy steel and cast iron.

M35 cobalt steel composition

The defining specification is the M35 grade steel with 5 percent cobalt content. This metallurgy delivers the hardness required for hardened metal, stainless steel and cast iron while retaining enough toughness for softer materials such as copper, aluminium, plastic and wood. Buyers who need carbide-tipped bits for masonry or concrete should look elsewhere.