U.N.C. 18 Pc H.S.S. Tap and Drill Set,

18 Pc Tap and Drill Set. 18 Pcs/Set Tap & Drill Set, UNC. Size of Drills: #36, #29, #25, #21, #7, F, 5/16″, U, & 27/64″. Ground from solid high speed steel. HSS Fully Ground.