The FX Luminaire WCHSMD20 Heat Shrink Wire Connectors are medium-sized, adhesive-filled, waterproof connectors designed for direct burial applications. These connectors provide two levels of strain relief through crimping, tin-coated copper butt splices, combined with heat-shrinking adhesive-filled tubes. The LightingShrink Ratcheting Crimper Tool ensures reliable metal-to-metal contact, creating a strong and permanent electrical connection. The adhesive-filled heat-shrink tube forms a waterproof seal that prevents electrical shorts and moisture ingress, while the slim, streamlined profile facilitates clean and discreet installations.