Century's 13 Piece Tap & Drill Set features precision cut threads, accurately formed for consistent, exact threading

Heat treated and tempered for file hard threads, and longer, useful life

Desgiend for hand cutting applications

Set includes: 4-40 NC; 6-32 NC; 8-32 NC; 10-24 NC; 10-32 NF; and 1/4-20 NC taps, #35, #7, #21, #25, #29, and #43 drills, and a 0"-1/4" t-handle tap wrench