For more than 30 years, SEFAC has been using the same tried and trusted self-locking screw to power its lifts, including their line of mobile column lifts. This technology has proven itself to be more robust than hydraulic lifts,according to the company. The self-locking screw system will not leak, does not rely on an independent lock (as it is self-locking) and is substantially maintenance-free. The entry level S1 series has a 12,000-lb capacity per column (48,000 lbs for a set of four). The top line lift available has a capacity of 18,000 lbs per column (72,000 lbs for a set of four). These lifts feature electronic capability for fault finding, synchronization and user-friendly controls. SEFAC offers after sales support, and covers free telephone technical support and annual maintenance inspection programs for its customers.