Active Aqua Titanium Step Drill Bit 1/4" to 1 3/8"Product Details Break new ground with The Stepper, your soon to be go to tool in the toolbox. Add this drillbit to your collection and you'll find yourself looking for new places to drill in the garden. Set up grow systems with ease or quickly get up to speed on other home improvement projects. 1 4" to 1 3 8" in 1 8" increments Heat treated HSS with titanium nitride coating Double flute for easy control Self startingno walking or pilot needed Specs