Kent T127DF, 10 pcs Pack 4.0", 8 TPI Bi-Metal T-Shank Jig Saw Blades For ALUMINIUM Pack of 10: Kent T127DF, 4.0 OAL, 8 TPI, Bi-Metal, T-Shank Jig Saw Blades Great for Aluminium (3/16" - 5/8"), Fiberglass (3/16"-3/4"), Plastics ( 3/16" - 1-1/4") Overall Length: 4.0" (100 mm), Working Length: 3.0" (75 mm) Blade is Milled and Side Set Bi-Metal Blade