One fit, 3 pack, wood & nails blade variety pack, arbor ensures proper fit on oscillating tool, titanium coating makes blade last longer, cut anything form wood to decking screws including pvc, pack consists of 1 each: 1-1/4″ wood blade, 1-1/4″ wood with nails bi-metal blade & 1-1/4″ coarse tooth blade, fits fein, bosch, makita, dewalt, rockwell, porter cable, milwaukee & more oscillating tools, adaptor included to fit dremel quick release & old rockwell.