3k75 c seriec 5 lever sashlock 67mm satin chrome the union 3k75 series 5 lever mortice rollerbolt sashlocks are suitable for use on timber doors hinged on the left or right and are also suitable for use on doors up to 50mm thick the lock has a deadbolt operation and is locked or unlocked by key from either side with the latch bolt being withdrawn by a lever handle from either side it has force resistant anti pick and anti saw security features and is available with square forend and striking pl