Dewalt Accessories DWA1220 Cobalt Drill Bit 5/16 in 3 Pack

Product Description

The DEWALT ACCESSORIES DWA1220 is an industrial-grade cobalt drill bit engineered for high-speed drilling in stainless steel and other hard metals. Measuring 5/16 inches in diameter, this bit ships in a 3-pack and features a Pilot Point split tip design that engages the material on contact. That starting geometry eliminates bit walking, giving the installer precise hole placement without a center punch. The cobalt construction provides heat resistance and edge retention needed when working through tough alloys. Licensed tradespeople and metal fabricators reach for cobalt bits when standard HSS tooling fails to hold an edge.

The DWA1220 is suited for metal-working applications in commercial and industrial settings. Common uses include drilling into stainless steel sheet and plate, angle iron, I-beams, and structurally similar ferrous and non-ferrous hard metals. The 5/16-inch diameter makes it a go-to size for bolt clearance holes, conduit knock-outs, and structural attachment points. The 3-pack quantity supports job-site continuity where bit wear is expected and having a replacement on hand matters.

Key Features

• Pilot Point split tip starts on contact and eliminates bit walking for accurate hole placement
• Industrial-grade cobalt construction delivers heat resistance and extended edge life in hard metals
• 5/16-inch diameter suits bolt clearance, conduit, and structural drilling applications
• Optimized for stainless steel, angle iron, I-beams, and other hard metal substrates
• Sold as a 3-pack to support job-site workflow and bit turnover in demanding materials

Compatibility

Designed as an OEM-style replacement and standard-use cobalt drill bit compatible with any 3/8-inch or 1/2-inch keyed or keyless drill chuck accepting straight-shank bits.

Installation Notes

Cobalt drill bits are installed and used by electricians, pipefitters, ironworkers, and general tradespeople performing metal drilling tasks. Use cutting fluid or a suitable metalworking lubricant when drilling stainless steel to manage heat buildup and extend bit life. Apply steady, moderate feed pressure and reduce spindle speed compared to drilling mild steel. Inspect the cutting edges before each use and retire bits showing chipping or significant wear to avoid workpiece damage or bit breakage.