Features and Benefits: 10 mm alloy steel bits that are small enough to reach into tough access areas, while still affording full engagement to the screw at a 90-degree angle;The handle?s contour design fits smoothly in hand for easy access and use, while its heat treat enhances the tools durability;Slim, compact design measuring 4.25? in overall length fits conveniently in pocket and the open slot on handle allows you to fasten or secure to key ring or other device.;Mayhew?s flat, low profile screwdrivers feature an innovative design that delivers high performance capabilities in hard-to-reach areas. Ideal for automotive assembly, small engine repairs, dash, and door actuator work, and more. Professional grade and quality made