Brand: Powerhouse Products Manufacturer's Part Number: POW351075 Part Type: Bore Gauges Product Line: Powerhouse Products Dial Bore Gauge Combos Summit Racing Part Number: POW-POW351075 UPC: 036584209614 Bore Adjustment Range (in.): 2.000-6.000 in. Case Included: Yes Case Material: Plastic Case Color: Black Quantity: Sold as a kit. Powerhouse Products Dial Bore Gauge Combos Get dialed in with Powerhouse Products dial bore gauge combos. Whether you're a beginner or a pro engine builder， you can measure rod bores， main bearings， and cylinder bores with precision. Setting the bore gauge to zero with a master or micrometer allows you to see the difference in the bore that you are measuring so that a precise measurement can be performed. Powerhouse indicators can automatically zero in at any position and convert inch/metric with the push of a button. A precision dial indicator， bore gauge， and special adapter and anvil/shim kit are included. Plus， everything is packaged in a great wooden box to keep it all organized. Engine building is precision work and Powerhouse has the tools to make precision power.