Best New Tools

A new line of metal-cutting Sawzall blades is cryogenically treated—they heat the blades, form them, then freeze them—producing a uniform tooth edge that resists chipping or dulling even in hard metals. The makers claim the cobalt-infused blades stay sharp up to 50 percent longer than the competition. Approximately $15 for a pack of 5, www.milwaukeetool.com