Hammer or percussoin drills are great for drilling holes into brick work.
he chuck is the grip mechanism that holds the bit firmly. The chuck size limits the size of twist drill the chuck can hold. Most operate without a key these days.
Do not attempt to service machine unless qualified to do so.
Keep an eye out for specials, as cordless drills are often promoted as a kitset with spare battery, case and screwdriver bits.
Always buy a drill with a two-speed gearbox. In high gear (typically 0-1000rpm), the tool spins fast enough for quick drilling, and in low gear (typically 0-400rpm) you get controllable, grunty, screwdriving. You change gear using a slide: make sure it operates smoothly and without excessive force.
Place effective guards over belts, pulleys, chains and sprockets.
Cordless Drill/Drivers provide versatility and are good for projects ranging from hanging up pictures and drywall to erecting a tool shed or attaching a satellite dish.
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