Includes long and short/standard contact points plus replacement pieces for your pet’s fence receiver collar. The washers are used to keep the receiver attached to the strap. The protective clear caps help to keep water and debris out of the switch port on receivers with correction level adjustment buttons. The 4 screws can be used to replace the receiver screws on Stubborn Dog receivers. Compatible with all PetSafe wireless and in-ground fences except the UltraSmart In-Ground Fence (PIG00-13619) and Stay + Play Wireless Fence (PIF00-12917).