The Universal Coin Operated Lock from Monarch Coin & Security can be made to accept nickels, dimes or quarters, or a variety of tokens, allowing a restroom trailer operator to control usage. Using tokens allows the operator to have a face-to-face contact with whoever is using the facilities, or restrict access to customers. There are no keys to pass out or retrieve and the facilities remain locked. They help promote cleaner facilities, offer customers added security, and generate revenue. The user inserts the appropriate coin/token in the entry slot at the top. The customer turns the handle and enters, and the door will latch as it closes. The lock will display “in use” in the window. When the customer exits, the inner door handle opens the door, and the door re-latches on closing. The display will show “vacant,” and is ready for the next patron. 800/462-9460; www.monarchcoin.com.