... quick-change coupling nut sleeve, squaring arm with scale, electronic back gauge, gauging table with stops and more JSL Q35Y-16,20,25 ... ! It comes standard with: quick-change coupling nut & sleeve, squaring arm with scale, electronic back gauge, gauging table with stops, punching base ... visibility. The large 15-inch squaring arm is inlaid with a scale and comes standard on all machines. A specially ...