This kit contains the most popular jig saw blades with a 1/4 in. universal tang. These blades fit Milwaukee jig saw model 6256-6 and other popular jig saws with this tang configuration. Assortment includes one each -2120 for metal over 1/8 in., -2160 for metal under 1/8 in., -2190 for metal over 1/4 in., -2300 for nail embedded wood, and -2310 for nail embedded wood.