All bits are supplied with a B3 Bearing. Bits #1908 and #1910 are the proper size for Biscuit Joining. The BB501 Bearing Kit increases the versatility of your rabbeting bits by simply changing the bearing size to vary your cutting depth. This set allows for a 1/4", 5/16", 3/8", and 7/16" cutting depth on all 1 1/4" bits or a 3/8", 7/16", 1/2", and 9/16" cutting depth on all 1 1/2" bits.
These kits contain a 5/32" Rabbeting Bit with a 1/2" B3 bearing to cut slots for #20 Biscuits. Also included are alternative B14 and B15 bearings to cut #0 and #10 biscuit slots respectively.