Trend TREBSC20100 No.20 Jointing Biscuits Beech Pack 100 for board thickness of 19mm. The Biscuits Beech expand up to 20 percent due to contact with working adhesive. Quick and easy to use with strong and accurate joints formed. As a result adds toughness and durability to a project. The Trend Jointing Biscuits are made up of laminated beech which is then compressed before being die cut. Jointing Biscuits must be stored in a clean,dry place away from moisture. Lastly, these No. 20 biscuits are ideal for softwoods, hardwoods, plywood and composition board.