It extracts dowels without the use of a slide hammer. It also eliminates the cost as well as the effort and potential hand injury.Fits the appropriate sized collet over the dowel; tighten the sleeve; use outer sleeve and nut to extract the dowelCan be used with air ratchet or traditional ratchetElimination of the slide hammer saves cost as well as effort and potential hand injuryMaster set includes both SAE and metric colletsCalifornia Residents Prop 65 warning: Products may contain a chemical known to the State of California to cause cancer, birth defects or other reproductive harm.This product has a manufacturer warranty against defects in materials and workmanship for a period of ONE (1) YEAR from the date of original retail purchase. See our Seller Return Policy for more details.