Biscuit jointing has proven to be one of the strongest fastest safest & most accurate ways to join hard & soft woods plywood composition boards etc. Compared to dowelling biscuit joinery is faster & more precise. The biscuits are made from laminated beech which is then compressed before being die cut. Beechwood biscuits expand up to 20 per cent when in contact with a woodworking adhesive. (e. g. PVA Glue). Size. No. 10. Packed in 1000s.