In Line Fuseholders 619 Posi-Lock Round Fuseholder 3 pc The round fuse holder incorporates a universal fit for full coverage of fuses and wire gauges to connect wire ends directly to the fuse holder. This Round version is a UL recognized component. Check out these advantages. • Crimp-less • solder-less • Tool-less (hand fastening connectors) • Rust-less • Re-usable • Weather resistant or watertight options