Milwaukee 48-20-4113 Spline Drill Bit 1-1/8x22 in 2ct

Product Description

The MILWAUKEE 48-20-4113 is a spline-shank rotary hammer drill bit designed for heavy-duty concrete and masonry drilling. The spline drive interface transfers rotational force and hammering energy from a compatible rotary hammer directly to the cutting tip, enabling fast penetration through reinforced concrete, block, and stone. At 1-1/8 inches in diameter and 22 inches in overall length, this bit is suited for deep anchor holes, through-slab penetrations, and structural drilling applications. Each unit is sold as a 2-count pack. Weighing 2.64 pounds per pack, the bit set is built for demanding jobsite use by licensed electricians, plumbers, and general contractors.

This bit is appropriate for residential and commercial construction where large-diameter, deep-bore holes are required in concrete or masonry substrates. Typical applications include anchor bolt installation, conduit penetrations through concrete walls or slabs, and structural through-holes. The 22-inch length provides the clearance needed to bore through thick concrete sections without extensions. The spline shank format is compatible with rotary hammers that accept spline-drive tooling rather than SDS-Plus or SDS-Max.

Key Features

• 1-1/8-inch cutting diameter for large-bore anchor and penetration holes
• 22-inch overall length for deep through-slab and thick-wall drilling
• Spline-drive shank for use with spline-interface rotary hammers
• Sold as a 2-count pack for backup availability on the job
• Built for concrete, block, and masonry substrates

Compatibility

Designed for use with rotary hammers that accept spline-drive shank tooling. Spline drive is a distinct interface — confirm your rotary hammer accepts spline bits before ordering, as this bit is not compatible with SDS-Plus or SDS-Max chucks without an adapter.

Installation Notes

Installation of this bit requires a rotary hammer with a spline-drive chuck; a licensed tradesperson should confirm tool compatibility before use. Always disconnect power from the rotary hammer before inserting or removing the bit. Wear appropriate eye, ear, and respiratory protection when drilling concrete or masonry. Follow applicable OSHA and local safety codes for silica dust control when drilling concrete.

Technical Specifications

• Cutting Diameter: 1-1/8 inches
• Overall Length: 22 inches
• Package Dimensions: 1.53 inches x 1.53 inches x 22.88 inches
• Package Weight: 2.64 pounds
• Shank Type: Spline Drive
• Quantity per Pack: 2
• UPC: 0045242103034

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-20-4113