The UK's most popular make of locks, Yale, is proud to introduce the Lockmaster full multipoint door lock mechanism which features patented pre-compression roller engagement for high security. Designed and tested in the UK to Yale's exacting standards, this lock faultlessly delivers high-performance security, improved ease of use and an impressive service life. It boasts the reassurance, reliability and outstanding features expected from Yale- the world's favourite security brand, securing homes for over 175 years. This Lockmaster multipoint door lock unit has 3 opposing steel hooks, incorporating a centre hook deadbolt and 2 steel anti lift pins and has four roller cams with a 35 mm backset, and so delivers the very best in security, operational performance and corrosion resistance. Dual follower availability, lift lever operation. * Corrosion resistance to BS EN 1670:2007 Grade 4 * Tested to a minimum of 100,000 cycles operational lifespan