This indispensable tool features a pressure actuated internal trip hammer that lets you use the punch one-handed. Just press firmly, and bam! It's the
right tool for the job whenever and wherever you need to start drilled holes
accurately. Rotating the cap adjusts impact pressure from light enough for
wood to heavy enough for cast iron. This model is perfect for hinge installation - the sleeve around the pin centers the punch in the hinge hole so that you can pre-drill with precision.