Lenox 30961MVB1424 Step Drill Bit 7 Hole Sizes Hss

Product Description

The LENOX 30961MVB1424 is a high-speed steel step drill bit designed for drilling multiple hole sizes in a single tool. It covers 7 hole sizes ranging from 14 mm to 25 mm in diameter, with a 10 mm step length between each size. The round shank with three flats measures 10 mm in diameter, providing a secure grip in compatible drill chucks. An oxide finish helps reduce friction and extend tool life during repeated use. This bit is suited for electricians, HVAC technicians, plumbers, and sheet metal workers who need clean, stepped holes in thin materials without swapping bits.

This step drill bit is built for use in light-gauge sheet metal, electrical enclosures, junction boxes, HVAC panels, and similar thin-stock applications. The stepped profile allows a single bit to open holes to seven distinct diameters, making it practical for conduit knockouts, sensor ports, and grommet holes encountered in trade work. It is intended for use with a standard corded or cordless drill fitted with a chuck that accepts a 10 mm round shank with flats.

Key Features

• 7 stepped hole sizes from 14 mm to 25 mm minimum to maximum diameter
• 10 mm step length provides clear size separation and control during drilling
• High-speed steel construction handles repeated use in sheet metal and thin stock
• Round shank with 3 flats (10 mm diameter) resists slipping in drill chucks
• Oxide finish reduces friction and helps protect the cutting edges
• Standard point type for accurate starting without a center punch on most thin materials

Compatibility

Designed as a standard-shank step drill bit for use with drills and drill presses that accept a 10 mm round shank with flats. Suitable for light-gauge sheet metal, plastic, and similar thin-stock materials common in HVAC, electrical, and plumbing applications.

Installation Notes

This bit is installed and operated by electricians, HVAC technicians, plumbers, and sheet metal workers using a standard drill or drill press. Ensure the shank is fully seated and secured in the chuck before operation. Use appropriate eye protection and secure the workpiece before drilling. Follow applicable workplace safety standards and consult material-specific guidelines when drilling into coated or hardened stock.