Set contains multiple quantities of the most commonly used sizes as well as bits used in rare applications. Premium grade S2 tool steel offers a durable composition to equal longer bit life. Driving bits are designed for quick change applications. 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. Set includes Phillips Bits - 1 each: 1 In. P2, 2 In. P2, 2 In. P3, 3-1/2 In. P2; 2 each: 1 In. PR2; 6 each: 1 In. P2; Slotted Bits - 1 each: 1 In. SL 1/4 In., 1 In. SL 1/8 In., 1 In. SL 3/16 In., 2 In. SL 3/16 In., 2 In. SL 1/4 In.; Square Bits - 2 each: 1 In. SQ1, 6 each: 1 In. SQ2, 1 each: 1 In. SQ3, 2 In. SQ2, 2 In. SQ3, 3-1/2 In. SQ2; TORX Bits - 1 each: 1 In. T10, 1 In. T15, 1 In. T20, 1 In. T25, 1 In. T30, 2 In. T15, 2 In. T20, 2 In. T25; Hex Bits - 1 each: 1 In. 3/16 In., 1 In. 1/4 In.; (1) magnetic drive guide.