This Light Bulb Changer Head Kit fits Standard, Floodlight, Recessed & Mercury Vapor bulbs. The Standard, Floodlight and Mercury Vapor heads have soft nylon grippers and a spring finger design ensuring a secure fit around the bulb. The Recessed Bulb head is a suction cup design that attaches easily and securely to any smooth surface floodlight-sized bulb and includes a string used to release the suction cup from the bulb. Caution - The Floodlight head should NOT be used for a bulb installed inside of a recessed can-type light. The Recessed Bulb head should be used for that application. All four heads fit the industry standard thread pattern found on our 16 and 11 3-section aluminum poles as well as our 11 3-section steel pole.