Question

professionals generally prefer to use which of the following tools when installing locksets?
a router
a hole saw
a keyhole saw
a boring jig, boring bit, and a mortise marker

Explanation:

When installing locksets, professionals need tools that can accurately create holes and mark mortises. A router is mainly for shaping edges. A hole saw is for circular holes but not comprehensive for lockset installation. A keyhole saw is for cutting curves. A boring jig, boring bit, and mortise marker work together: the jig guides the bit for accurate hole - making, and the mortise marker helps mark where the lock mechanism will fit.

Answer:

a boring jig, boring bit, and a mortise marker