Milwaukee 48-20-4056 Spline Drill Bit 9/16 Inch 2-cutter

Product Description

The MILWAUKEE 48-20-4056 is a spline-shank rotary hammer drill bit engineered for drilling into brick, block, and concrete. The 2-cutter carbide head measures 9/16 inch in diameter and delivers efficient material removal in rotary hammer applications. With an overall length of 10 inches and a usable drilling depth of 4 inches, this bit is suited for anchor hole drilling, sleeve anchor installation, and through-penetration work in masonry assemblies. Licensed tradespeople working in mechanical, electrical, and general construction will find this bit a standard tool on commercial and residential job sites alike.

This bit is designed for use with spline-drive rotary hammers in masonry and concrete drilling applications. Typical uses include drilling holes for anchor bolts, conduit supports, pipe hangers, and similar fastener penetrations in concrete block, brick, and poured concrete. The 9/16-inch diameter accommodates common anchor sizes used across HVAC, plumbing, and electrical rough-in work. Sold individually, it fits into standard tool inventories for crews that cycle through bits regularly on heavy concrete work.

Key Features

• 9/16-inch diameter 2-cutter carbide head for efficient concrete and masonry drilling
• Spline shank for secure engagement in spline-drive rotary hammers
• 10-inch overall length with 4-inch usable drilling depth
• Compatible with rotary hammer drilling in brick, block, and concrete
• Sold as a single bit per unit for flexible inventory management

Compatibility

Designed for use with spline-drive rotary hammers. Compatible with standard spline-shank rotary hammer chucks used in masonry and concrete drilling applications.

Installation Notes

Installation is performed by trades using spline-drive rotary hammers, including HVAC, plumbing, electrical, and general construction technicians. Confirm the rotary hammer is set to the correct mode (rotary hammer, not chisel-only) before drilling. Wear appropriate PPE including eye protection and hearing protection when operating rotary hammer equipment. Inspect the bit shank for wear or damage before each use and replace if the carbide cutters show excessive wear.

Technical Specifications

• Diameter: 9/16 inch
• Overall Length: 10 inches
• Drilling Depth: 4 inches
• Shank Type: Spline
• Cutter Configuration: 2-cutter head
• Weight: 0.78 pounds
• Package Dimensions: 1 inch x 1.75 inches x 13 inches
• Sold As: Each
• UPC: 0045242102464

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-20-4056