Socket inserts 1/2" XZN, 20-piece set

1/2" socket insert, XZN, M5, M6, M8, M10, M12, M14, length 62 mm 1/2" socket insert, XZN, M16, M18 (with bore), length 62 mm 1/2" socket insert, XZN, M5, M6, M8, M9, M10, M12, M14, M16, M18, length 100 mm 1/2" socket insert, XZN, M10, M12, M14, length 138 mm