KEYLESS, NO BATTERIES: A mechanical push button code lock. Enter the code and turn the knob to open; there is no wiring, battery or charging, so nothing can go flat. On the inside, a lever opens the door without a code for a quick, easy exit. FITS DOORS 33-55MM THICK: Supplied with a 60mm backset tubular latch, fixings and a drilling template. Non-handed, so it fits left or right opening doors. Fitting needs a drill and basic woodwork skills; on thinner doors the connecting bolts may need trimming to length. OVER 8,000 CODE COMBINATIONS: Use a code of 4 to 6 buttons. Like most mechanical code locks, the buttons can be pressed in any order. Your starting code is on the card in the box; changing it means taking the lock apart and resetting the pins with the tool supplied. HOLD-BACK FOR BUSY TIMES: Switch on the latch hold-back to leave the door free to push open during working hours or deliveries, then switch it off to lock with the code again. FOR OFFICES, STOREROOMS AND HMOS: Ideal for offices, storerooms, plant rooms, workshops, HMOs, rentals, home offices, garages and side doors. Suitable for internal doors and sheltered external doors in low to medium traffic areas. 2-year guarantee against mechanical defects.