Milwaukee SDS Plus Core Bit (2" depth)

No. These are SDS-Plus core bits, made for SDS-Plus rotary hammers. An SDS-Max tool uses a larger shank and will not accept the SDS-Plus adapter, so you need SDS-Max core bits for that hammer.

Drilling depth is 2 inches. That covers most block, brick and slab-face penetrations for conduit and box work, but it will not get through a thicker wall in one shot. For deeper holes you drill, break out the core, and repeat, or step up to a longer core bit.

Four sizes: 1-9/16 inch (48-20-5215), 2-9/16 inch (48-20-5230), 3-1/8 inch (48-20-5235), and 4-3/8 inch (48-20-5255). The 1-9/16 and 2-9/16 suit single conduit runs, while 3-1/8 and 4-3/8 are the sizes electricians reach for when pulling multiple runs or setting a larger sleeve.

Yes, and Milwaukee includes a centering bit in the 48-20-3582 adapter assembly for exactly that. It spot drills so the core teeth do not wander when you start on block or concrete. Once the core has bitten in, the centering bit can be pulled so it is not fighting rebar or the back of the hole.

For anything above roughly an inch in diameter, a core bit is the right tool: it cuts only the ring of material instead of pulverizing the full hole, so a smaller SDS-Plus hammer can manage a 3-1/8 or 4-3/8 inch penetration. A solid masonry bit is faster and simpler for small anchor and single small-conduit holes. Keep in mind the core bit's 2 inch drilling depth, so for full-wall penetrations you work in stages.

The core body and the adapter/centering assembly are separate parts. That means one adapter runs every diameter, you replace only the worn core body, and you can swap sizes on the job without buying a complete bit each time. The adapter with centering bit is 48-20-3582.

The body uses a spiral core design that reduces friction and pushes debris out of the cut, which helps when gravity is not doing the work for you. The asymmetrical carbide teeth are rated by Milwaukee for up to 20 percent faster drilling, so less time holding the hammer up.