Multi Point Door Locks The Chameleon Adaptable Multi Point Lock 3 point locking system has been designed to retrofit the largest range of Multipoint locks on the market. ? Available in 25mm, 28mm, 30mm, 35mm, 45mm and 55mm backsets ? Available in 40mm for Hook and Roller Only ? 16mm and 20mm faceplate ? Distance from spindle to top hook