70500 tap socket set fits most common tap sizes, not only fits all number and fractional M. C. T. I. standard taps thru 1/2". Also fits 1/8" NPT taps and metric taps thru 12mm manufactured to M. C. T. I. standards for a wide range of applications Manufactured from alloy tool steel and coated with a protective black oxide layer, these tap sockets provide increased hardness, durability and resistance. Equipped with a vinyl holder for storage, they are easy to place and difficult to lose the sockets Ideal for restricted areas and areas where a t-handle not fit, each drive tap socket adapter has a square that closely matches the size of the tap, insert the tap into the socket until the square end is fully engaged 70520 socket #1, 70540 socket #2, 70560 socket #3, 70580 socket #4, 70600 socket #5, 70620 socket #6, 70640 socket #7, 70660 socket #8, a tap holder, Weight: 0.92373687778 Pounds, Manufacturer: Awwertse