LENOX 13 Piece Bi Metal Hole Saw Kit Right Angle Drills Hyper stream air nozzle for extra Hyper stream air nozzle for extra tough conditions and both offer a 2" x 2" receiver tube opening to accept a ball mount or other towing accessories 2 arbors and 2 pilot bits For wood and metal applications Speed slot™ plug removal system is easy to use Non binding coating provides faster cuts 10% Taller than prior generation hole saws for a deeper cut T2 technology delivers longer blade life and faster cutting Split point pilot drill bit provides faster penetration and less walking on contact Case included for convenient storage 13 Piece LENOX bi metal hole saw kit includes 9 hole saws