5-button 20mm lock, secure product. Anti-vibration, you don't have to worry about the RV opening while driving. No key required: press the button to lock, press again to open. Easy installation: screw cap and replacement lock included. Can be used on cabinet doors, cupboard doors, motorhomes, caravans, drawers, campers, furniture, etc. The knob requires a 20mm diameter hole. Suitable for doors/drawers with a thickness of 15-27mm. Mounting pitch: 37 mm. Package contents: 5 pieces Lucky Encounter