No More Guesswork - You'll Know The Precise Gauge Of Wire Or Sheet Metal You're Working With. Measures From 0 To 36 Gauge (0.19 - 8.23mm). A Necessity For Anyone Who Works With Wire And Metal!* For Wire & Sheet Metal * British Standard 0-36 * 0.19 - 8.23mm * Hardened Stainless Steel * Approx. 6.5" Long