Features and Benefits:�Driving bits designed for quick change applications�Heavy-Duty quantities: Multiple quantities of the most commonly used sizes�Magnetic drive guide helps reduce slipping and wobble by holding long fasteners in place while the sleeve retracts as the screw is driven into the material�Premium grade S2 tool steel - durable composition equals longer bit lifeThis set offers a variety of driver bits for everyday use as well as rare applications. Made of premium grade S2 tool steel, these bits are heavy duty, designed for hard use.