Grip-Tite Rounded Bolt Remover. Available in both SAE and metric sizes, these innovative sockets feature six internal cams that expand over and onto the bolt or nut. This expansion causes the cams to grab the bolt or nut, no matter how badly rounded the fitting might be, thus enabling the socket to remove the fitting. 14 Piece SAE and Metric Socket Set, Rounded Bolt Remover, 3/8" Drive. Set Includes: Grip-Tite 14 Standard Length Sockets SAE & Metric Set Covers Sizes: 3/8, 7/16. 1/2, 9/16, 5/8 ), 11/16, 3/4 & Metric 10mm, 12mm, 13mm, 14mm, 15mm, 17mm, & 18mm. 12 per case.