I've been given this screwdriver without an instruction manual and embarassingly don't know how to change the head of it to fit different screws. Model is SJ-CD14.4KUK . Advice appreciated, thanks!

JW, December 2006

I've never seen that make, but I believe the shank is magnetised, so the bit should just pull out.
If a screw has been driven home tightly the bit can sometimes get caught in the shank. Put the lock on, grab hold of the body of the bit with a pair of pliers and give it a very slight turn anti-clockwise.

Big Softy, April 2007