With a bladeshaft mounting system that reduces vibration, the FS520 concrete saw's bladeshaft system also allows for a minimum of 250 maintenance-free hours, eliminating daily greasing of the bearings. The raise-and-lower system provides more control and reduces the amount of force necessary to move the saw. Its self-contained hydrostatic differential drive system eliminates drive gears from rear wheels, also eradicating slipping. Husqvarna Construction Products. 800-527-5451. www.husqvarna.com