PDC Reamers from Infinity Tool are designed with a taper and a spiral that help make perfect holes, no matter the distance. The purpose of the taper is to centralize the reamer in the pilot hole to ensure a symmetrical hole is cut, equalize the size of the cut from side to side and enable the driller to ream from pilot to finish bore in the majority of holes. Pulling tabs are also available for all of Infinity Tool reamers. They are manufactured in push or pull body configuration, can be used both horizontally and vertically, and are designed for 25,000 psi compressive strength or less hard formations. 888/838-6657; www.infinitytoolmfg.com; Booth 3944