Ensure hand tools such as chisels and punches, which develop mushroomed heads during use, are reconditioned or replaced as necessary.
Get an extra battery pack when buying a drill so you won't have to wait for a battery to charge. Now the drill bit will stay where you want it to.
For heavy-duty projects involving masonry consider using a hammer drill.
Choose a lighter, lower-voltage drill for light-duty work, especially if you are using the drill for long sessions, or for overhead work. Choose a higher voltage for heavy-duty work.
Power drills come in two types, DIY quality or professional quality.
Keyless chucks are easier, because there's less fiddling involved.
Do not attempt to service machine unless qualified to do so.
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