Trend Jointing Biscuits are made of laminated beech which is compressed before being die-cut. Beechwood biscuits expand up to 20% when in contact with wood adhesives. Biscuit jointing has been proven to be one of the strongest, fastest, safest and most accurate ways to join hardwood, softwood, plywood, composition boards etc. Compared to dowelling, biscuit joinery is faster and more precise.