Check the listing for details. 4pack Window Sash Locks Middle Hole Sliding Cam Sash Locks with Rectangle Keeper. Condition: New. Listed at 25.91 USD. Window security locks can be used on aluminum, wood and vinyl windows, suitable for vertical and horizontal sliding windows, single-hung windows and double-hung windows or doors. They are common locks for homes, public buildings, etc. that require sliding windows.SpecificationMaterial: Zinc AlloyTotal Size: 70 x 12.5 mm / 2.75 x 0.5 inch (L*H)Distance between hole centers: 53 mm / 2 inchPacking List: 4 Set Slider Window Latch, 16 x ScrewsAdvantageThe lock is made of zinc alloy, which is hard and not easy to break, wear-resistant, corrosion-resistant and rust-resistant. Strong and durable.Features cam-type locking mechanism designed to grab and pull the keeper and meeting rails firmly together, providing tighter seals and increased security.The surface is smooth and textured, and the beautiful and elegant design adds a decorative effect.