SDS+ Core 4-3/8"X2"

What you’re looking at

• A core bit shell (cup-style cutter)
• Designed to cut a circular ring in concrete/block/brick
• Uses carbide teeth around the rim for cutting
• The center hole is for pilot/centering pin use during setup

Key features visible in the image

• Carbide cutting segments at the top edge
  → These are what actually grind/cut through masonry
• Side slot / relief hole
  → Helps with dust relief and sometimes core plug removal
• Thick-wall steel body
  → Built for impact + torque from rotary hammer (not a standard drill)
• Tapered base
  → Connects to the shank/adapter system (SDS Max or Spline depending on setup)

What this type of bit is used for

This is a thick-wall core bit, used for:

• Large hole penetrations in concrete walls/slabs
• Electrical conduit openings
• Plumbing and HVAC sleeves
• Anchor pass-throughs
• Block/brick coring work

How it works (simple breakdown)

1. Rotary hammer spins and hammers the bit
2. Carbide teeth grind a ring shape
3. Core (center plug) stays inside the bit
4. Operator removes the plug after cutting

Where it fits in your system (important)

This is not a standard SDS drill bit like MX4.

It sits here in the lineup:

• SDS+ bits → small holes (anchors)
• SDS Max MX4 → solid-hole drilling (deep, rebar capable)
• Core bit (this image) → large diameter hole cutting
• Diamond core → heavy-duty deep/large coring (reinforced concrete)

Likely match to your earlier list

This image most closely matches:

• Milwaukee SDS Max / Spline Thick Wall Carbide Tipped Core Bit system
• The same category you were asking about with:
  • guide plate
  • centering pin
  • adapter shank