Material: This door lock is made of high quality stainless steel. It has a brushed finish and a glossy appearance. It has high strength and long durability. Thickened door twist, not easy to break, lockprecision, wear resistance Easy to install: This lock is easy to install and remove as it does not need to drill a hole. Solid round locking tab controlled by connecting keys for easy opening and closing. And he designed inthe double curved door bolts, will be perfect for family house, flat gate, office door, etc. Wide Application: These locks are perfect for both commercial and home applications. Most retail establishments with display cases will find this security lock to be a great addition to their store. Note: This lock is only suitable for glass door thickness 10-12mm. No need to punch, just stuck in the proper position on the glass, tighten the screws to fix.