BOSCH HC2051 5/16 in. x 4 6 Bulldog SDS Plus Rotary Hammer Bit

Amazon

Optimized brazing and hardening process for long life 15% faster (compared to S4L) Bosch-made carbide tip is tougher and more durable under heavy loads Proprietary Bosch hardening process results in more holes per bit Ideal for anchoring and through-hole applications in concrete 4-flute design for fast dust removal Centric tip for optimal hole geometry, Weight: 0.1 Pounds, Manufacturer: BOSR9

Radwell UK

(PRICE/BIT) 5/16" DIAM, SDS-PLUS SHANK, CARBIDE-TIPPED ROTARY & HAMMER DRILL BIT 4" USABLE LENGTH, 6" OAL, FOR USE WITH BRICK, MASONRY, AND CONCRETE