Iron Mind CoC Key: Miles to Mils

GPS for your grip training--know where you are and you'll reach your goal faster. Here's how you gauge the gap and track your progress--precisely.

Steps of 2, 4, 6, 8, 10, 12, 14 and 16 mm, along with 19 and 54 mm measures,aircraft-grade aluminum. Overall length 2-1/8".