Wera Driver Bit Set with Quick-Release Rapidaptor Bit Holder, 12 Pieces, 173751, Includes: 1x PH#1x1", 2x PH#2x1", 1x PH#3x1", 1x SQ#1x1", 2x SQ#2x1", 1x SQ#3x1", 1x TX#20x1", 1x TX#25x1", 1x TX#30x1", 1x 2ʺ Rapidaptor Universal Bit Holder, One-handed bit changes are made simple just by pushing the sleeve forward and replacing the bit, For use with 1/4" hexagon shank bits, Provide a safe and easy way to store and transport your most commonly used bits - Put them in your toolbox, shirt pocket, or keep them with your drill