The PANELLIFT� Model 439 will outperform all manual drywall lifts in the industry. Expect low maintenance and long life since there are no cables or sheaves to replace. The patented heavy duty chain drive system delivers safe, long-term use, sheet after sheet and it's backed by a three year drive train limited warranty. The unique torque limiter ensures that only safe load weights are going up and damage to the machine from overloading is prevented. Low loading height (35") makes it easy to load and the high 14'5" reach means you can reach 95% of all ceilings without extra extensions.