The Master Lock 503R Group Lock Box for effective lockout of large equipment & machinery & can be wall mounted or used as a portable lock box. Secure each lockout point on your equipment with a single padlock. Place the keys in the group lock box & then each authorised employee places their personal padlock onto the lock box to prevent access to the keys stored inside. When maintenance work is completed employees take their padlocks off the lock box, freeing the keys inside. Keys inside cannot be accessed until the LAST employee has removed their personal padlock. Master Lock 503R Wall or Portable Lock Box Can hold up to 14 personal padlocksideal for shift work with staggered hours Colour red