The IIX Equipment GP-21X is a versatile gin pole clamp kit. It consists of two clamps and a pulley assembly. Requires a 2" O.D. 10-12 foot long pole to be supplied by customer or order the GP-UPS two-piece UPS shippable aluminum gin pole below. Works with Rohn BX/HBX/HDBX towers and 20G/25G/45G/55G towers and can even be used mounted on the antenna mast to aid in antenna installation.