THE PACKAGE INCLUDES: 10 pcs 14-6AWG four-hole round brass connection terminals, 10pcs 18-10AWG copper two-hole round connection terminals, 20pcs 14-10 AWG two-hole square brass connection terminals, 100pcs mounting screws, 40pcs heat-shrinkable tubes, and 2 spanner MATERIAL: Wire connector nut kit is made of thickened brass with conductivity and current carrying capacity. The surface is acid-washed and corrosion-resistant, equipped with zinc-plated hexagonal screws for strong oxidation resistance, and the quick connect terminals can provide long-term stable connection EASY INSTALLATION: Wire connectors are equipped with zinc-plated hexagonal screws and complimentary hexagonal spanners, no crimping tools required, quick and easy installation. Each set of connectors comes with 3:1 heat shrink tubing for extra insulation and waterproof protection CONDUCTIVITY: 3 models of wire connectors are made of thick brass material to ensure electrical conductivity and current-carrying capacity WIDE APPLICATION: Terminals are suitable for a variety of applications including marine, automotive, electrical and electronics industries, mechanical equipment, distribution cabinets, etc., providing flexibility for a wide range of projects