mechanical engineering - Why are most jigsaw blades designed to cut on the up stroke and have teeth that point towards the shank? - Engineering Stack Exchange
Irwin Marathon 3071410D 4" 10TPI U-Shank Down Cut Jig Saw Blades Pack of 3 | eBay
4 in. 10 TPI Down Cut Jigsaw Blade | City Mill
Lenox 5pk 4" T shank Jigsaw Blade 1991387 from Lenox - Acme Tools