The Rear Outfeed provides up to 15 inches of additional support for ripping long boards or large panels. With hardened metal construction and aluminum mounts, the outfeed is designed exclusively for the SKILSAW® SPT99 10 IN. Heavy Duty Worm Drive Table Saw with Stand. The outfeed is easy to install and is adjustable. To adjust, simply slide the fence to the proper position and hand tighten the lock knob. Then let it rip!