Makita D-00907-25 Set of 25 Standard Carbide Bits for SDS-Plus Hammers (0.5 “x 6”) Rustic-style carbide tip penetrates contact and goes through rear bar. Slimmer style reinforced floor flute for efficient dust removal. The dynamic chisel-shaped head keeps some contact with the material at all times. Carbide tip.

From the Manufacturer

5/16-by-6-1 / 4-Inch 25-Pack STD SDS Bit, Makita’s Thruster style carbide tip penetrates on contact and plows through rebar, reinenforced ground flute for efficient dust removal