Irwin® Hanson®, 97094, Tap and Die Set, Combination, Measurement System: Imperial, 25 Piece, 1/4-18 to 1-14 Tap, 1/4-18 to 1-14 Die Thread, NPT/UNC/UNF/UNS Thread Standard, Hexagon Die Shape, Plug Tap Chamfer, High Carbon Steel Tap, Bright Tap, Plastic Case Package Type, Adjustable Die: Yes