Total Size: 50*27mm/ 1.97*1.06inch (L*W); Mounting Hole Dimension: 3.5mm/ 0.14inch; Mounting Hole Spacing: 34mm/20mm; Packing List: 4 x Barrel Bolt Latch with 60 Screws Advantage: The barrel latch lock is made of stainless steel, 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 barrel bolt design, this latch provides a secure locking mechanism that keeps your door firmly closed. 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. Not limited by the installation angle, vertical and horizontal installation are both suitable.