The SKIL 47-Piece Screwdriving Bit Set delivers an assortment of the most commonly used screw driving bits for a variety of projects that require driving bits into wood, plastic, and metal. The bit kit includes 35 1-inch bits, 9 2-inch bits, two 1-7/8-inch nut setters, and a 2-3/8-inch magnetic extension bit holder for extra reach. Removable inserts allow you to customize your bit organization within the case. The screwdriver bit set comes in an interlocking case featuring a clear lid for easy bit identification, easy screwdriver bit removal, and compatibility with other SKIL accessory cases for custom configurations.