DEWALT DW3755H 4-Inch 8 TPI Aluminum/Fiberglass Cut HCS T-Shank Jig Saw Blade (5-Pack) The product is 5 Pack, 4" 8T, Aluminum/Fiberglass Cut HCS T-Shank Jig Saw Blade, T-Shank High Performance Wood Cutting HCS Easy to use The product is manufactured in China Precision ground teeth stay sharper longer and deliver smooth, clean cuts Deeper gullets with increased free space remove more material for faster cutting T-shank design fits all Bosch and DEWALT jig saws