Machine Screw and Fractional Plug Taps. Precision Cut Threads, Accurately Formed For Consistent, Exact Threading. Heat Treated And Tempered For File Hard Threads, And Longer, Useful Life. Designed For Hand Cutting Applications. For Use With Tap Wrenches To Cut Internal Threads. 75% Thread Engagement. Plug Style Is The Most Commonly Used Style Of Tap -3 To 5 Threads Chamfered. Wire Gauge Brite Drill Bits. Made From Feature Premium Grade High Speed Steel. Precision Ground Points. Designed To Operate In Stationary Or Portable Tools. General Purpose Drilling In Wood, Metal And Plastic. Numbered Drill Bits.