ICETrekkers launched Diamond Grips after a year-long trial in Alaska. The case-hardened, alloy-steel grippers are attached via a rubber sling to the bottom of a boot. They can be used by first responders operating in winter conditions, such as an ice rescue on frozen lakes or rivers. Its patented six-pointed diamond-like beads are strung on a steel aircraft cable with hundreds of biting edges under the heel and the ball of the foot to grip ice, snow and rock or gravel, according to the company. They are available from Grainger and a variety of other safety product distributors and outdoor retailers.