This is a Central Tool Co. #6487 Timing Gage. Range 1"; gradations .001"; reading 0 -100; for 2 cycle and small engines. Sells new for $106.95. Also has gage extender kit adapters (model #6484) with 14mm and 18 mm adapters, which sells new for $22.95. Selling all for $55.00. Cash only please.