Tap Wrench Handle Type Knurled Handle Shape Sleeve Fractional Tap Capacity 1/4 in to 5/8 in Machine Screw Tap Capacity 3/16 in to 1/2 in Metric Tap Capacity 16.00 mm Overall Length 12 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