Compatible with LS-30,LS-50B, LS-70A, LS-70B, LS-70C, LS-80A, LS-80B, LS-80G, LS-80L, LS-80X,LS-90,LS-B10,LS-B10W,LS-B20,LS-B20W,RD-100W and PA 350 laser receivers Static thread design for clamping wide surfaces safely Lightweight and extra strength for easy handling Brand new design for added durability Built-in bubble vial for quick and accurate leveling