Equipped with a ball bearing guide, diameter B=15,8 mm ideal for cutting rabbet width of H=9,5 mm. You can also choose optional bearing diameters B= 9,5 - 12,7 - 19 - 22 - 28,5 - 34.9 mm or H= 12,7 - 11,1 - 8 - 6,3 - 3,2 - 0 mm for rabbets.