Brand: RUKO Item: Hand tap set Material: High-speed steel (HSS) Application: Thread making Finish: Bright Thread Type: UNC and UNF Set Includes: (7) imperial taps (8-32 UNC, 10-24 UNC, 10-32 UNF, 1/4-20 UNC, 1/4-28 UNF, 5/16-18 UNC, 5/16-24 UNF), (7) jobber length drill bits (13/64in, 7/32in, Letter F, Letter I, #21, #25, #29), tap wrench with two-jaw chuck, heavy duty plastic case Number of Pieces: 15 For Use On: Aluminum, brass, plastic, steel, bronze and cast iron RUKO hand tap set, 15 pieces, high-speed steel (HSS), UNC and UNF thread type, bright finish.