8 gauge to 20 Gauge Ratchet Crimping Tool - Professional grade ratchet crimping tool crimps heat shrink insulated terminals from 8 gauge to 20 gauge in one tool. Ergonomic soft-grip handle with external easy access ratchet release. Slotted crimping head maintains even and consistent crimp pressure across all gauge sizes. Use of this tool will maintain UL certification on heat-shrink insulated terminals. Hardened steel crimp head is color coded for various terminal sizes.