KWB Quick Change Bit Holder - Extra Short Magnetic Bit Holder with 35 mm Stainless Steel Sleeve and 3/8 Inch Hex Shank for 1/4 Inch Bits - - Amazon .com
Amazon.com: double square bit set
Amazon.com: Lang Tools 5220 7-Piece Fine Tooth Bit Wrench Set , Black : Tools & Home Improvement
Amazon.com: double square bit set
Wera - 5059640001 Series 4 840/4 Z Sheet Metal Bit, Hexagon BO 2mm, 1/4" Drive (Pack of 5): Screwdriver Socket Bits: Amazon.com: Tools & Home Improvement
Williams bith0703 7/32 Standard-Bit, Sechskant, 1.12-inch lang : Amazon.de: DIY & Tools