With more torque and longer tip life, these SPEC OPS Nut Drivers deliver ultimate control and perfect tip fit. The SPEC OPS 7-piece metric nut driver set includes 7 in. driver x 3/16 in.,1/4 in., 5/16 in., 11/32 in., 3/8 in., 7/16 in.,1/2 in. All SPEC OPS nut drivers are manufactured with CR-V heat-treated steel blades for up to 2X longer tip life. These nut drivers are tough, durable and constructed with max-control MOA grips for up to 40% more torque. The handle slot allows other drivers to be inserted into the handle to apply added leverage and torque. For added convenience, the marked endcaps allow for quick tip style identification when stored in your tool belt or pouch. This nut driver set also comes with a zipper storage bag. And with a guarantee to deliver a lifetime of mission capability on the world's toughest job sites, these drivers have been drop tested at 100 feet to surpass MIL-SPEC standards. All SPEC OPS tools are backed by our five-star, hassle-free lifetime warranty and with each purchase made, we support our nation's heroes by donating 3% of proceeds to veteran and first responder causes.