The Klein 85091 is a conduit-fitting and reaming screwdriver that is designed to be used on electrical metallic tubing. This reamer has an engineered replaceable blade, a blade that is only approved for use with this tool. This reamer also has three different conduit sizes which are: 1/2", 3/4", and 1". It also features a cushion grip handle for added comfort and a secure grip. This tool has a tip size of 5/16", a shank size of 2-1/2" and an overall length of 7-1/2". Klein Tools is the world leader in the design and production of high-quality and commercial-grade tools. In cooperation with Klein Tools, we at PlumbersStock carry high-quality and reliable products for a very affordable price. Grab yours now here at PlumbersStock.