Lamello 145020 Fixo Self Clamping Biscuits, Mixed Blister Pack (40 E20-H and 40 E20-L) Connects and clamps with one strike Curved ridges in Fixo biscuit pull the material together No clamps required, Fixo biscuit supplies clamping pressure H style Fixo biscuits join vertical members for carcass construction and boxes L style Fixo biscuit join horizontal members for mitered frames and face frames.