This drywall support system has a wide range of uses. It is well-made and convenient for various woodworking projects, such as serving as a cabinet jack, drywall jack, crown molding support, range hood holder, ratcheting cargo bar support pole, and so on. All support poles are GS certified, with a weight capacity of 154 lb (70 kg). The pole jack is made of strong metal, and the handle is cast from premium aluminum. The non-slip TPR bases, which leave no scratches, are ideal for various working conditions. This adjustable labor-saving arm features adjustable height, and its textured rubber surface helps hold the rod tightly for different purposes. There are 2 lengths available: 1. Medium Rod: 23.6 in to 45.3 in; 2. Long Rod: 49.2 in to 114.2 in. It is sold in 1 PC, 2 PC, and 4 PC sets. Please select the desired length and set. It also has additional features: spring-loaded pins that pop out into holes in the outer pole can lock the height. The white calibration line helps realign the pins with the holes if the rod is rotated. The handle is used for minute adjustments. The safety lock ensures it holds securely after extending this "third hand" tool. This quick support pole secures building materials, providing you with a "third hand" to free up your hands. If you've ever wished for an extra hand when installing cabinets alone, this cabinet installation tool will be of great help to you.