Tap Wrench, Handle Type Knurled, Handle Shape Sleeve, Fractional Tap Capacity 3/16 in to 1/2 in, Machine Screw Tap Capacity 1/4 in to 1/2 in, Metric Tap Capacity 12.70 mm, Overall Length 9 in, Function Firmly Hold Square or Round Shanks, Plunger Operated By Knurled Sleeve, The Spring Inside The Sleeve Causes Plunger to Back Off When Pressure is Removed