The Starrett 653 Individual Component is a bench-type comparator gage that is ruggedly built for in-process and final inspection work. The dial indicator can be adjusted vertically and locked in any position. A sliding ring with a locking screw below the beam permits swinging the indicator to either side. The ring also acts as a safety device, preventing the beam from accidentally dropping. There is a fine adjustment on the beam for the final indicator setting. The hand-lifting lever on the indicator raises the spindle and releases it to contact the work. The left-hand lever is furnished unless otherwise specified. Both gages have a maximum vertical capacity of 9-1/4" (235mm) and a throat depth of 5" (125mm) and a vertical indicator fine adjustment of up to 1/2" (12.7mm). Post diameter is 1-1/2". These 653G Series have a Starrett Grade A, Crystal Pink Granite base, measuring 8" x 12" x 2" (200 x 300 x 50mm). Its base is finished to an overall tolerance of .0001" (0.0025mm). This is a comparator with a granite base without an indicator.