Total Size: 55*40mm/ 2.17*1.57inch (L*W); Mounting Hole Dimension: 4mm/ 0.16inch; Mounting Hole Spacing: 38mm/27mm; Packing List: 1 x Swivel Bolt Latch with 6 Screws Advantage: The swivel latch lock is made of zinc alloy, which makes it durable, robust, and strong enough to withstand daily wear and tear, not easy to fade after long-term use, durable, and has a long service life. With a sturdy 180 degree rotary flat latch design, this latch provides a secure locking mechanism that keeps your door firmly closed, which is applicable to the left or right door locks. Instruction: This barrel latch lock is easy to install and comes with all the necessary hardware required for installation. Simply drill two holes, one on the door and the other on the frame, align the plate and screw it in place. Application: The swivel latch lock is a durable lock hardware designed for door, window, cupboard, shed, bathroom, bedroom to provide secure and quiet locking performance.