Impact Quality Nut Setters, 6 Pc. Set. Drivers Are 6" Long With Power Shanks Includes 6mm, 7mm, 8mm, 10mm, 11mm & 12mm. Black Impact Finish Large Size Markings For Easy Identification. These are my go-to tools for putting into a hex gun and doing dash/engine work. They are the perfect size and are extremely handy. I only wish they made a 13,14 and 15MM. But i cannot recommend these highly enough, especially for the price! Absolutely amazing value!