Topcon's Holder 6 laser receiver bracket works with LS-80A, LS-80B, LS-80G, LS-80L, and LS-B10 laser receivers. Holder 6 features a static thread which allows you to clamp to wide surfaces without the clamp's thread hanging out the side of the clamp in harm's way. Holder also features light weight, new design for extra strength, and built-in bubble vial.