RICHELIEU 203380 21-piece cobalt drill bit set

21-piece cobalt drill bit set

The RICHELIEU 203380 set contains 21 premium cobalt drill bits made from M35 steel with 5 percent cobalt content for strength and heat resistance. Fully ground manufacturing produces straighter, more precise holes across all included sizes. A thicker core design adds rigidity for demanding metal drilling tasks. The 135-degree split-point tip on bits 1/8 inch and larger removes the need for a center punch and prevents walking on hard surfaces.

Metalworkers needing reliable bits for hard steel

Tradespeople drilling stainless steel and other ferrous or nonferrous metals will benefit from the cobalt alloy and split-point geometry. Users who only drill wood, plastic or soft materials will not need the heat resistance and rigidity these bits provide. Buyers requiring bits smaller than 1/8 inch without a split-point tip should look at a different set. Anyone needing coated or carbide-tipped bits for specialised applications should consider other options.

M35 steel with 5 percent cobalt

The M35 grade steel containing 5 percent cobalt is the single specification that determines whether this set matches the job. It delivers the hardness and heat resistance required for drilling hard steels including stainless steel. If the work involves only mild steel or non-metal materials, a standard high-speed steel set may be sufficient. Choose this set when the material demands cobalt-level performance.