Trend biscuits are made of die cut beech. Beechwood biscuits which expand when in contact with a woodworking adhesive such as PVA glue. They are ideal for strong, fast, and accurate jointing of hard and soft woods, plywood and composition board. Compared to doweling, biscuit jointing is faster and more precise. Size 0=47.5 mm x 15.5 mm x 4 mm For board thickness=8 mm - 12 mm Size 10=53 mm x 19 mm x 4 mm For board thickness=13 mm - 18 mm Size 20=60 mm x 23 mm x 4 mm For board thickness=19 mm+. Includes 30 x No.0 Biscuits|30 x No.10 Biscuits|40 x No.20 Biscuits.