Review on 8Pcs UL Heavy Duty 4 AWG 5/16" Stud Battery Cable Lugs Tinned Copper Tubular Ring Terminal Connectors DIN 46235 - AIRIC 4 Gauge Wire Lugs by Brandon Carraway

These are the best quality lugs I have ever received. You can see the thickness in the pics. These where 2.35mm think. The other pic is other good quality lugs there 1.5mm thick. The neck of these are very long providing plenty of crimp area and contact between wire and lug. Which is very important for high amp applications. Overall beat lugs I have I received out of thousands over the years online.