Brand: Ratech Manufacturer's Part Number: 10003 Part Type: Pinion Depth Gauges Product Line: Ratech Pinion Depth Setting Tools Summit Racing Part Number: RAT-10003 UPC: 753215753246 Pinion Depth Gauge Material: Aluminum Pinion Depth Gauge Finish: Natural Dial Indicator Included: No Quantity: Sold individually. Notes: For use on aftermarket gear sets with the checking distance marked on the pinion head. This is not compatible with OEM gear sets which do not list the checking distance. Ratech Pinion Depth Setting Tools These Ratech pinion depth setting tools give you accurate pinion depth settings in five easy steps. Just set the tool on top of the pinion head with its slot end in the carrier bearing journal and then insert a dial caliper in the slot. Position the depth rod so it touches the bottom of the carrier bearing bore， take the measurement from the caliper (sold separately)， subtract that number from 3.25 in.， and you have the correct pinion depth.