Size:110mm Quantity: 1 ratchet + 10 bits Compact and portable: This set has a compact size of 4 inches long and 1 inch deep, allowing it to be used in even the tightest of spaces. Exquisite Mechanism:This right angle screwdriver set is powered by a reversible chrome vanadium steel ratchet system with 36 teeth, which provides a smooth ratchet in both directions and allows precise adjustments. Simply turn the rotary knob to adjust the orientation during use; the compact and comfortable pocket size has a magnetic clip inside the hex bit holder to keep it inserted. Magnetic Drill Adapter:The magnetic drill adapter ensures that any hex bit from 1/4" can be securely connected for higher torque. WIDE APPLICATION:This mini ratchet screwdriver features the most commonly used PH2 bit, which almost covers required screw sizes by most appliances, automobiles, households, machinery and other equipment. And always wear eye protection while working to reduce the risk of injury and keep them out of reach of children.