What is a SDS Rotary Hammer and What is It Used For?
2018-5-6 · Unlike power drills, the rotary hammer uses an SDS (special drilling system) chuck to hold onto the drill and chisel bits without risk of losing it while boring holes in tough materials. There are three types of chucks that rotary hammers use: SDS-Plus, SDS-Max, and spline shank. The difference between each chuck is the size of the bit they can use.
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