Cut thin metal cleanly with this Irwin Marathon bi-metal jigsaw blade. Fully hardened HSS teeth handle 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. Universal T-shank fits most modern jigsaws without an adapter.

• Bi-metal construction with fully hardened HSS teeth
• Precision-ground milled teeth for metal cutting
• 20 teeth per inch - fine metal cutting
• 3" blade length
• Universal T-shank fits most modern jigsaws
• 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.