10/14TPI is variable teeth, teeth size: 3 TPI > 3/4 TPI > 4/6 TPI > 5/8 TPI > 6/10 TPI > 8 TPI > 8/12 TPI > 10/14 TPI > 14 TPI, Great for cutting soft ferrous metal, mild steel, aluminum, copper, lead, zinc and other nonferrous metals. Bi-Metal blades offer more cutting versatility and longer life through their unique construction, high speed steel edge offers durable, tough cutting ability.