40mm - 60mm. This GATEMASTER Superlock Digital Double Sided has digital keypads on both sides, allowing for secure and convenient keyless access. The latchbolt is adjustable and easily rotated to ensure easy fitting for both left handed and right handed gate applications. It is available in 2 sizes to suit 10 to 30mm flat bar or box section gate frames and 40 to 60mm gate frames and comes with a 1 year guarantee.. Keypads on both sides of the lock. Suitable for both left and right handed gates. Adjustable and removable latchbolt for easy fitting. Stainless steel latchbolt latches 15mm into gate post