The 9915 CRKT Big Boy Driver Tool, designed by Joe Wu of Mountain View, California, is a compact must have for the glove box or kitchen drawer. This driver tool is made of black anodized aluminum with a magnetic driver tip, a ball bearing spinner for smooth action, and comes with an adapter that transitions from quarter-inch to four-millimeter bits. The CRKT Big Boy Driver Tool has an overall length of 3.76-inches and it weighs 1.7 ounces. Made in China.