The Kovac Ice Master Nils Ice-Auger Adapter is an affordable 2-piece conversion kit that turns your power drill and Nils hand auger into a ice-fishing power auger. The adapter consists of the exclusive retainer disk and adapting pin that protects the auger from going to the bottom if it disengages from the drill chuck. It also takes the weight of the auger off the chuck, putting it on the handle to protect the chuck from damage. It can also help your auger blades last longer. Works with Nils ice-fishing hand augers. The Kovac Ice Master Nils Ice-Auger Adapter also works on adjustable pin and threaded augers sizes 4", 5", 6", 7" and 8". Fits 1/2" drill chucks. Drill up to 35 holes on one charge of your drill.Manufacturer model #: NIL2011. Affordable 2-piece conversion kit Connects a power drill to a Nils Ice Auger Exclusive retainer disk Helps auger blades last longer Fits 1/2" drill chucks Works on adjustable pin and threaded augers