The L10 lock is our narrowest lock. With a major width of only 0.204", it can fit into some pretty tight spots. It comes in two thicknesses: L10B, for stacking into a deep hole pattern and L10S, for installation at the surface. When installing locks on a machined surface, leave a small portion (approx 0.040") above the surface to peen and machine down. Use this lock in material ranging from 1/8" to 3/8" in thickness.