Milwaukee Tool 48-89-9332 Step Drill Bit 13 Sizes Hss

Product Description

The MILWAUKEE TOOL 48-89-9332 is a high-speed steel step drill bit designed for drilling multiple hole sizes in a single tool. With 13 hole sizes in one bit, it eliminates frequent bit changes during layout and rough-in work. The hex shank measures 1/4 inch in diameter and seats securely in standard hex-chuck drivers and drill/drivers. Overall length is 3-11/16 inches, and each step increments by 1/16 inch. The bit is rated for heavy-duty use and suits electricians, HVAC technicians, and plumbers who need clean, stepped holes in thin-gauge materials without a knockout punch or hole saw setup.

This step drill bit is intended for use on aluminum, brass, and copper workpieces. It is well suited for sheet metal panel work, electrical enclosure knockouts, plumbing stub-out plates, and HVAC equipment panels. The 1/16 inch step length allows controlled, incremental hole sizing. The three-flat hex shank prevents bit rotation in the chuck during high-torque drilling. Hole diameters range from 6 millimeters minimum to 32.5 millimeters maximum, covering the most common trade hole sizes in a single pass.

Key Features

• High-speed steel construction rated for heavy-duty use in aluminum, brass, and copper
• 13 hole sizes in a single bit, eliminating repeated bit changes
• 1/16 inch step increments allow precise, graduated hole sizing
• 1/4 inch three-flat hex shank resists slipping in standard chuck drivers
• 3-11/16 inch overall length fits standard drill/driver chucks without adapters
• Hole diameter range: 6 mm to 32.5 mm

Compatibility

Designed for use with any 1/4 inch hex-chuck drill/driver or quick-change chuck system. Suitable for drilling thin-gauge aluminum, brass, and copper sheet materials common in HVAC, electrical, and plumbing trade applications.

Installation Notes

A licensed electrician, HVAC technician, or plumber typically installs or uses this bit as part of rough-in or panel work. Secure the workpiece before drilling to prevent spinning or deformation. Use cutting fluid or lubricant when drilling copper or brass to extend bit life and improve cut quality. Do not force the bit through thick-gauge steel or hardened materials, as this bit is optimized for non-ferrous thin-gauge stock.