18-Piece, 6-32 To 1/2"-13 Tap Sizes, Comoware Drill And Tap Sets, Hss Jobber WIDELY APPLICATION: Drilling, tapping and deburring/ countersinking in one bit, one-step processing, greatly save processing steps and time costs, improve working efficiency. TOP GRADE QUALITY CORROSION RESISTANCE: Bonderizing Surface protects the metal from corrosion. Improve the finish adhesion and corrosion resistance. High quality, long lasting and durable. HIGH QUALITY MATERIAL: HSS for fast cutting against tough wood material. High hardness, offer superior cutting power and durable. SET INCLUDES: 9 Jobber Length Drill Bits: Wire gauge sizes #36, #29, #25, #21, #7; Letter sizes F, U; Inch sizes 5/16", 27/64". 9 Hand Taps: 6-32 UNC, 8-32 UNC, 10-24 UNC, 10-32 UNF, 1/4"-20 UNC, 5/16"-18 UNC, 3/8"-16 UNC, 7/16"-14 UNC, and 1/2"-13 UNC. EASY STORAGE LIFETIME GUARANTEE: Set includes the indexed metal case for easy storage and organizing. We only care about your satisfaction. We stand behind all of our high quality products so we offer a No Question Asked on our Drill Bit Set. Please contact us (through Amazon if past the standard return window) and we will be pleased to assist you.