The GEARWRENCH Bolt Biter Nut Drivers feature a bidirectional design to allow users to remove and reuse damaged fasteners with ease. With their minus-size options, the nut drivers are able to work on worn or damaged fasteners. Additionally, their tapered entry design lets Bolt Biter Nut Drivers seat or disengage from fasteners easily, without the need for hammers or mallets, the company says. Available in a 16-pc, No. 86171, and 8-pc set, No. 86170.