The chain drive technologies, used for years in our professional drywall lifts, are now coupled with a manual winch and torque limiter. The model 439 will reach heights of 14 ft 5 in. and still load at the height of just 35 in. this means that you will no longer need extensions to reach 95% of the lids. If you need to reach higher, you can add the model 154 (18 In.) extension to reach almost 16 ft- making the Panellift® model 439 the highest reaching lift in the industry. The heavy-duty chains mean that you will never have to replace cable sheaves or cables again. Damaged lifts from overloading are a thing of the past. The tripod is also equipped with new 6 In. casters making it much easier to roll over obstacles on the floor. You can still use the 439 to do walls or ducts like our other models.