
Round here we get alot of aluminium or wooden sliding patio doors. These have a rigid handle either side of the door, but tucked behind the handles are usually black plastic levers which move up and down. Movement of these levers moves two or more 'pins' (which seem more like mushroom headed bolts screwed partway into lock). When in the locked position these bolts are located in their keeps, a bit like mushroom rollers do on upvc door mechs. Moving the black plastic lever simply slides these bolts out of the keeps. The locks have euro/oval cylinders which usually simply deadlock the plastic handles from moving. I have never removed one but does the door usually have to come off the track to allow the lock to slide out of the bottom (or top)?
Any advice appreciated and also correct name for this type of lock.
regards