Mayhew Best Way Tools 84073 Square to Hex Adapter, 3/8-Inch Square by 1/4-Inch Hex, 2-Inch Length - 100 Piece bulk pack Mayhew Best Way's Square to Hex Adapter Bits come in a convenient, economical bulk package. Whether they're at the job site or in your garage, our bits are made to last. These bits are backed by a limited warranty. Features Ball detent holds socket Blast finish increases bit grip on fastener and rust preventative dip increases tool life Custom heat treat ensures best performance Can be used with 1/4-Inch hand drivers Works with quick-change bit holders, magnetic, and non-magnetic bit holders USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.