Irwin Marathon 4 in. Carbon Steel U-Shank Jig Saw Blade 10 TPI 2 pk By August 9, 2026 No Comments Irwin Marathon 4 in. Carbon Steel U-Shank Jig Saw Blade 6 TPI 2 pk. Carbon Steel T-Shank Jig Saw Blade 6 TPI 2 pk. Product Type: Jig Saw Blade. Shank Type: U-Shank. Paint And Paint Supplies. Material: Carbon Steel. Continue Reading