Spline Thin Wall Core Bit 12" Adapter Shank

The Milwaukee 48‑03‑3540 is a 12‑inch spline adapter shank designed to extend the reach of Milwaukee thin wall core bits when drilling into concrete, brick, block, or other masonry materials. It lets contractors and installers access deeper or hard‑to‑reach drilling locations without needing extra‑long individual core bits, increasing versatility on job sites.

Key Features

• 12‑inch adapter shank extends drilling reach for core bits
• Spline drive compatibility matches Milwaukee spline core bit systems
• Designed for use with Milwaukee thin wall core bits (typically 5"–6")
• Heavy‑duty construction for durability in masonry applications
• Ideal for drilling holes in walls, floors, and other concrete structures where extra reach is needed

Specifications

• Model: 48‑03‑3540
• Adapter Type: Spline thin wall core bit adapter shank
• Length: 12 inches overall
• Compatible With: Milwaukee thin wall core bits (approx. 5"–6" range)
• Typical Use: Masonry and concrete drilling extensions
• Material: Hardened steel

Typical Applications

• Electrical or plumbing penetrations through thick concrete walls
• Creating openings for pipes, conduit, HVAC ducts
• Drilling in tight or obstructed masonry locations
• Renovation or new construction core drilling tasks

✅ Summary:
The Milwaukee 48‑03‑3540 adapter shank lets you extend the reach of your Milwaukee thin wall core bits for deeper masonry drilling, adding flexibility and capability when standard bit lengths aren’t enough