Central Tools 6554 Telescoping Gauge Set
Checks cylinders, recesses, slots. Long handles for deep measurements (up to 5-1/2 on largest) Both contacts release or lock by turning knob at end of handle Measurement is taken with micrometer (not included) Includes 6 pieces: 5/16-1/2, 1/2-3/4, 3/4-1-1/4, 1-1/4-2-1/8, 2-1/2-3-1/2, 3-1/2-6