Cut thin metal cleanly with this Irwin Marathon high-speed steel jigsaw blade. Fully hardened HSS handles aluminum, sheet steel, copper, and brass, and the 20 TPI tooth count delivers a finer finish than the 14 TPI variant - the right blade for thinner sheet stock where edge quality matters and the material is too thin for a coarser blade to engage cleanly.

• High-speed steel (HSS) for metal cutting durability
• Precision-ground milled teeth - fully hardened
• 20 teeth per inch - fine metal cutting
• 3-1/4" blade length
• U-shank fits legacy jigsaw models (pre-T-shank)
• 2 blades per pack

Tip: A general rule of thumb in metal cutting: keep at least 3 teeth in contact with the material at all times - 20 TPI works well on sheet stock down to about 18 gauge.