Abstract: A kit or kits are disclosed for temporarily securing a surveying instrument such as a total station, theodolite, laser or laser target to an existing structure on a job site. A basic kit includes an arm assembly with an elongated rigid member with a mounting mechanism such as a tribrach mount on one end to receive and secure the surveying instrument to the arm assembly. Each kit further includes at least two clamps with an adjustable jaw configured to tighten each clamp onto a respective position along the elongated rigid member. Each clamp may include a jaw configured to tighten onto an existing rebar, a masonry wall anchor, or a bracket and ratcheting strap configured to secure the arm assembly to an existing upright column structure such as an I-beam. A kit may further include tools for installing, adjusting or leveling the assembly.