Shopsmith 500 520 Table System Upgrade Vinyl Fence End Post Net Free Area (Sq Net Free Area (Sq Don’t wait until it’s too late Mark V Model 500 to Model 520 ProFence table system upgrade provides a significantly larger worktable support system for older Model 500 machines including a 49% larger providing added workpiece support and working precision Two 22" x 7 3 8" floating extension tables slide on connecting tubes and lock into position anywhere between the main worktable and the rigid extension table Four 27" long steel connecting tubes slip through the worktable and extension table rails and tie the table system components together with knob style locks 2 telescoping legs with swiveling ends extend to 44 1 2" and lock at any height in between with a quick twist to provide outboard support for floating extension table connecting tubes New larger 24 1 2" long x 2 1 2" thick rip fence includes a double T slot on its top surface plus another T slot in each side for attaching shop made jigs and other accessories 2 levers lock it at the front and rear of the worktable with a quick flip New saw guard system featuring a see through upper guard with built in depth of cut indicator