Product details:

Accurately Measures in 0.001 in.... Hard Anodized Aluminum... (1) Dial... (3) Indicator... Storage... Increments Hard Anodized Aluminum Components Includes (1) Dial Indicator (3) Indicator Extensions Storage Case Laminated Instructions Ring & Pinion Setup Tool Features Properly set pinion depth to prevent ring gear whining, premature wear, and failure Calibration block machined from aluminum and flat-bottom drilled for pinpoint accuracy Designed for comfortable grip or to use in a vise All aluminum components are hard anodized for a lifetime of strength and durability Accurately measures in 0.001 in. increments Includes Dial Indicator, (3) indicator extensions, and custom-molded storage case Laminated instructions provided to avoid fluid damage and deterioration Engineeredfor use with center sections that have 1/2 in. diameter cap bolts May be used on housings with 5/8 in. diameter bolts by holding the fixture in place for measurement American Made