The Ultra-X drill bit features a unique solid carbide head that reduces vibration and drills precise holes. Designed for optimal drilling performance in reinforced concrete, the bit’s flute design prevents lock-up when rebar is encountered and quickly removes dust through its short, wide channels. The one-piece four-cutter solid carbide head offers optimal performance in reinforced concrete, while its optimized flute core strength maximizes impact and bit strength. Metabo.