What is a ratchet spanner?

Answer 1

A ratchet spanner is a single ended spanner normally with a socket end that can be interchangable. There a key on the head of the spanner that allos the user to move the handle trough and arc when teh socket is on a nut/bolt . In one direction the socket is then locked and with turn the nut/bot and when reversing the action it moves freely. This allows the user to keep the scocket in conatct with the nut/bolt at all times. The key and be reversed to allow the unscrewing of the nut/bolt.

These differ from an opened ended spanner which has to be removed and then placed back on the the nut/bolt to continue the turning motion.

Answer 2

"In mechanical engineering, a ratchet is a device that allows linear or rotary motion in only one direction, while preventing motion in the opposite direction. Ratchets are used in many other mechanisms, including clocks, capstans, turnstiles, spanners, winders, cable ties, jacks, screwdrivers, and hoists. The term is also used for a socket wrench." I got this from wikipedia

Answer 3

A ratchet extension is a metal piece that attaches to the end of a ratchet wrench to make it longer so you can reach hard to reach bolts.