Eklind Tool 10022 Hex Keys Standard & Metric 22 Piece Set 8650 alloy steel Hardened and tempered Black oxide finish 22 piece set includes 13 long arm standard sizes in .050", 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16" and 3/8" and 9 small arm metric sizes in 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm, and 10mm Compact holder firmly retains each key