Flexible socket design allows a full 360° of freedom for the universal head to angle and rotate, providing more access to fasteners in tight spaces. 10-piece set includes 3/8 " drive high visibility impact sockets-10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm.