The 40mm Yale Maxsec Chrome Nightlatch offers maximum protection against known attacks, meeting British standards. It features a 20mm anti-saw bolt for increased strength and comes with a high security TS007 1* 6 pin rim cylinder and two keys. The lock is resistant to anti-drill, anti-pick, anti-bump, anti-carding, and anti-saw attacks, with automatic deadlocking. The latch can be held back with a simple button push for convenience. Specifications: Colour: Chrome Dimensions: H9 x W5.5 x D3.3cm Weight: 1.7kg Guarantee: 10 years. The Yale PBS1 and PBS2 British Standard Nightlatches also offer maximum protection against known attack methods, are insurance and Police recommended (Secured by Design approved), CE marked, and Kitemarked to BS3621:2007. They feature a 20mm anti-saw bolt, automatic deadlocking, and a push-button hold-back function. Supplied with a high security TS007 1* 6 pin rim cylinder, fitting instructions, a 10-year guarantee, and 2 keys. Available in Polished Chrome with a 40mm or 60mm backset. The bolt throw is 16mm, and an extended strike plate strengthens the door jamb. Suitable for glass panel doors.