3 Lever Sashlock Square Forend 64mm. The Latchbolt has the Easi-T reverse function to save undoing the case so it can be reversed in seconds. British Standard BS EN 12209 Rated Lock used as a matter of course by the national house builders. This lock provides a good degree of security and carries a 10 year mechanical guarantee. It has been CE and Certifire tested. Suitable for use in all domestic, industrial and commercial environments.