features stronger mechanical life, more than 250,000 years service life, high quality and durability, bringing you peace of mind and your home from intrusions. EASY TO INSTALL - Quick to install, including instructions. Can be mounted 1 3/8 in. (35mm) to 2 1/2 in. (64 mm) thick and requires 1 1/4 in. (32mm) hole diameter, wood or metal door for surface mounting., Weight: 0.74516244556 pounds, Manufacturer: Rtxbvg