Monster 400 Crimpless Ring Terminals - 1/0 Gauge and 4 Gauge (MPC P400 CRT 1) Patented PowerQuip compression-fit connection allows for ultimate current transfer Designed for easy connection to 1/0 and 4 gauge power cables Designed to fit nearly all battery terminals Reusable design - no crimping required 400 Series exclusive Ultra Polished Mirror Chrome finish