Wood biscuits are designed for use with a biscuit joiner.
#R2 5/16 in (8 mm) x 13/16 in (20 mm) Mini Beech Wood Biscuit, PK 100 The joiner cuts a slot in the two pieces of wood to be joined.. The wafer-shaped compressed beech wood biscuit is inserted into the slot and when coated with a water-based glue expands to tightly fill the slot forming a secure, precise, and invisible joint.