L & F multi-drawer lock (rollerarm); nickel finish;head 24mm square; overall length 40mm; body diamere 17mm; 200 key differs; 2 keys supplied per lock; 92 series; 03 movement; snap clip fixing; a turn of the key rotates the roller arn of the lock which moves the locking bar (not supplied) downwards.Pegs on the bar engage into catch plates on the side of the drawers,thus preventing them form being opened.