For Central Tools 6434 Dial Indicator Cylinder Sleeve Height Counterbore Gauge. Perfectly fit for all diesel engines. Pointed contact for cylinder sleeve height. Flat end contact for counterbore depth. Professional measurement tools to ensure the accuracy of your work. Range: 0-1″; Graduations: 0.001″. Includes 4374 – Dial Indicator, 4375 – Base, 4230 – Flat Contact, 4378 – Pointed Contact, Hex Wrench and Carrying Case. The rotatable bezel with clamp for easy zero set. The interchangeable markers provide reference points for all your measurements. The limit markers can be moved without interfering with the clamp. Lug back with 1/4 hole. Premium grade hard stainless steel rack, stem, spindle and contact point, jeweled bearings for high sensitivity and accuracy. Hard coated crystal dial face for scratch resistance with anti-glare finish. Waterproof, dustproof and shockproof for long-lasting reliability. 6434 Sleeve Height & Counter Bore Gauge.