just twist the collar ring and these tools will change from a standard cordless drill to a hammer drill.
The rotary-only mode is for general purpose drilling and driving fasteners. Use this mode with standard drill bits for wood and metal as well as masonry drill bits. In rotary-percussion mode, the tool provides both a rotary drilling and hammering action. The hammering action pounds concrete and masonry, which breaks up the material while it drills. Use this mode for drilling masonry materials using carbide-tipped masonry drill bits.
These drills have a keyless chuck for fast bit changes. All have a variable speed—the further you depress the trigger, the faster the drill rotates. They also have an adjustable clutch that lets you adjust the torque.
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