Diablo, 1/4" x 3-1/2" x 6" SDS-plus full carbide head concrete anchor hammer drill bit. Diablo's SDS-plus 4-cutter full-carbide head concrete anchor hammer drill bits are one of the strongest, most durable, and fastest tapcon installation bits. Diablo's full-carbide head bits withstand the stress of high-powered hammer drills and the impact of rebar cutting, delivering extreme durability and strength. Produced with tri-metal diffusion bonding technology, the full-carbide head resists heat and prevents breakage for maximum life and productivity. Precision tip delivers the stability and accuracy required to produce fast, precise holes in concrete with rebar for anchor setting. Optimized for maximum performance in corded and cordless SDS-plus rotary hammers.