Small, triangular shaped PROTECTA RTU holds 1 oz. (28g), 20g and 15g BLOX baits. With angled entry holes, it fits flush against a wall or in a corner where mice travel. The interior baffles lead mice to the bait. Compact PROTECTA RTU measures 5 1/4" (l) x 1 1/4" (h) x 3 3/4" (w). It fits in tight baiting places under pallets, in cupboards or behind appliances. This tamper-resistant bait station automatically locks when closed, keeping bait away from intruders. It unlocks with the PROTECTA¨2-prong key.