A unique biscuit jointing set that is truly universal, accepting Numbers 0, 10 and 20 biscuits both singly or in pairs for extra strength when making tenon type joints in thicker material. The complete sets comprise 2 x 4mm groovers, 3 x bearings, (one for each of the biscuit sizes) and a 6.3 spacer. 1/4"(6.35mm) shank. Overall diameter 40mm. Cutter thickness 4mm.