Check the listing for details. Commercial Door Push Bar Panic Exit Device Lock Fire Emergency Lock Heavy Duty. Color: Silver, Condition: New. Listed at 47.70 USD. How to Install 1. Measure the position of the lock core. 2. Use a drill to punch a hole. 3. Open a suitable lock core hole. 4. Fix the lock. 5. Insert the product onto the lock rod and fix the lock securely. 6. Fix the head cover. 7. Fix the tail iron cover. 8. Cover the tail cover. 9. Try if the the lock outside cylinder can open normally. 10. Lock the card to the appropriate location, and then you have fixed a single door unlock successfully. Specifications Color: Silver Material: Iron Process: Baking Paint Shape: Rectangle Style: Modern Assembly Required: Yes Mounting Type: Door-mounted Applicable Door Width: ≥43.5cm/17.13in Opening Force: ≤67N Applicable Door Thickness: Within 80mm/3.15in Lock Head Width: 4.2cm/1.65in Product Size: 65*15.5*5cm/25.59*6.1*1.97in.