Viking Drill and Tool 56610 Type 723 Hi-Carbon Plug/Taper/Bottom Tap Bit Set, 4 x 40" 3 pc. Set Hi-Carbon Steel Machine Screw Taper, Plug and Bottoming Styles Taps Ideal for routine maintenance, repair work & rethreading Designed for hand threading work in a variety of materials Tap produces a class 2B thread Includes: plug, taper and bottoming tap