This UHPPOTE Drop Bolt Lock is the perfect solution for your security needs. It is sturdily constructed and features a solid bolt holding force of 1000Kg/2204lb. It can be opened manually or electrically and is fail secure, meaning it is locked when power is removed. It also has an autolock time delay of 0/3/6/9 seconds and a cylinder with one side being a key and the other a knob. Suitable for wooden, metal and PVC doors, this lock is sure to keep your property safe and secure.