Kobalt 379758 1/4-in, 3/8-in and 1/2-in Drive Xtreme Access Go-Through Socket Set with Case, 49 Piece Universal socket design works with: 6pt, 12pt, spline, star, square, most rounded Versatility eliminates the need for deep sockets Low profile gives better access to reach more places Dual-functional spline-drive works on both SAE and metric fasteners Pass-through design allows use with any bolt length