STRC Aluminum 1-Piece Metric Nut Drivers are CNC Machined from a single piece of aluminum, cut to a perfect tolerance with amazing factory looks. Featuring knurled handles for good grip and ease of handling, as well as a drilled hollowed center to reduce weight. These nut drivers also feature thinned wall construction so it can more easily fit into places where space is limited. Package includes one 5.5mm driver, and one 7.0mm driver.