... blow. One can drill bigger holes much faster. Rotary hammers have such force, in fact, that the ... they require special bits which can lock into the rotary hammer and continue on spinning while smashing away.A ... today are: SDS, SDS-MAX, and SPLINE SHANK.Rotary hammer drills have an oil filled gearbox, which ... the jammed bit backed out of the hole with vise grips or monkey wrench. Worn masonry drill bitA ...