Disston Company 120030 Hss Black Oxide Drill Bit 11/32 in

Product Description

The DISSTON COMPANY 120030 is a high speed steel (HSS) jobber-length drill bit with a black oxide finish, designed for general-purpose drilling across a wide range of materials. The 135-degree split point features four cutting edges that prevent bit walking on contact and deliver fast penetration without a center punch. The black oxide tempering treatment reduces frictional resistance and improves chip flow during drilling. At 11/32 inches in diameter and 4-3/4 inches in length with a straight shank, this bit fits standard drill chucks and is well suited for use by electricians, plumbers, HVAC techs, and general contractors who need a reliable twist bit for everyday trade work.

This drill bit is intended for drilling into wood, plastic, wallboard, plywood, soft metals, aluminum, brass, and bronze. It is also suitable for occasional use in stainless steel and other hard metals. The jobber length and straight shank make it compatible with most corded and cordless drills used in residential and light commercial applications. It is packaged individually on a carded backing for single-unit retail or job-site use.

Key Features

• 135-degree split point with four cutting edges eliminates walking and starts on contact
• High speed steel construction provides durability across metal, wood, and plastic applications
• Black oxide tempering treatment reduces friction and promotes chip evacuation
• Jobber length with straight shank fits standard drill chucks
• Rated for occasional use in stainless steel and other hard metals
• Suitable for wood, plastic, wallboard, plywood, aluminum, brass, and bronze

Compatibility

Designed as a general-purpose replacement or supplemental drill bit for standard straight-shank drill chucks used in corded and cordless drills across residential and light commercial trade applications.

Installation Notes

Install into any standard keyed or keyless drill chuck rated for straight-shank bits. Ensure the workpiece is secured before drilling to prevent movement. When drilling metals, use appropriate cutting fluid to extend bit life and reduce heat buildup. Follow applicable safety practices including eye protection and secure workpiece clamping.