Shop for Hand Tools at The Home Depot. CST/Berger 55-SAL28ND. Features: Magnetically-dampened, wire-hung compensator for optimum range and accuracy. Compensator lock protects instrument during transport or storage; also acts as a handy compensator checking tool. Large effective aperture and minimum focus of 1 foot. Top-mounted optical sight for quick reference. Large, easy-to-use precise focusing knob. Easy-to-read horizontal circle. Right angle prism for easy bubble viewing. Sealed, dust-protected leveling screws. Water-resistant, sealed construction plus sunshade for use in various weather conditions. Fine motion knobs on left and right sides with friction-braked rotation, endless horizontal drive. 1:100 stadia for distance estimation. 5/8-in-11 threads to fit standard tripods.