AccusizeTools - 18 Pcs/Set H.S.S. Tap & Drill Set, UNF in Metal Box, 0001-0050 18pcs/set UNF Taps &amp; Drills Set High Speed Steel HSS Fully Ground High Quality 6-40UNF 8-36UNF 10-24UNC 10-32UNF 1/4&#034;-28UNF 5/16&#034;-24UNF 3/8&#034;-24UNF 7/16&#034;-20UNF 1/2&#034;-20UNF