Masonry Drill Bits

Relton carbide masonry drill bits in SDS-Plus, round shank, A-taper, and Tapcon pilot configurations. SDS-Plus bits (REL207) are the production standard for rotary hammer work — faster, longer-lasting, and compatible with Bosch, DeWalt, Milwaukee, and Hilti SDS-Plus chucks. Round shank bits (RELGRT) fit standard keyed and keyless chucks. Tapcon pilot bits (RELTC) are sized specifically for concrete screw anchor installation. Not sure which bit you need? See the Masonry Drill Bit Selection Guide.

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SDS-Plus Masonry Drill Bits — Relton REL207 Series

The Relton REL207 is the SDS-Plus masonry bit contractors reach for when drilling into concrete and block. The SDS-Plus shank engages the hammer's drive mechanism directly — no slip, full energy transfer to the carbide tip. Compared to a round shank bit in the same diameter, an SDS-Plus bit in a rotary hammer drills faster, runs cooler, and outlasts standard bits on production anchor work.

For anchor holes, match the bit diameter to the anchor diameter. A 1/2 inch wedge anchor needs a 1/2 inch bit. Drill the hole at least 1/2 inch deeper than the required embedment — the extra depth allows drilling debris to collect at the bottom of the hole and prevents it from packing under the anchor tip, which is a common cause of anchor installation failures.

Tapcon-style concrete screws are the exception to diameter matching. A 3/16 inch Tapcon uses a 5/32 inch pilot bit (Relton RELTC); a 1/4 inch Tapcon uses a 3/16 inch pilot. The screw threads must bite into the concrete — use the correct undersized pilot. See the Concrete Anchor Drill Bit Chart for a complete size reference across all anchor types.

Shop Masonry Drill Bits

Masonry drill bits are most commonly purchased alongside concrete anchors — the bit type and size are determined by the anchor being installed. Eugene Fastener stocks wedge anchors and sleeve anchors to pair with the Relton bit line. If drilling into a slab where rebar is a possibility, keep Rebar Eater bits on hand — standard carbide tips shatter on contact with embedded steel. The Concrete Anchor Drill Bit Chart shows the exact bit size required for every common anchor type and diameter, including screw anchors that require an undersized pilot bit.

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