PROFESSIONAL CRIMPING TOOL: This hand crimper has efficient ratcheting mechanism and professional grade crimping die for proper rock-solid crimps every time. This crimping tool works best with heat shrink connectors PRECISE RATCHET STRUCTURE: Wire connectors are crimped by squeezing the handle through a complete ratcheting cycle until the handle releases automatically. The ratcheting function allows to secure a wire connector while you can insert the wires into the crimp UPGRADED RED COPPER MATERIAL: High quality red copper provides excellent Conductivity, ensures less voltage instability, make your wiring connector project more perfect RELIABLE CONNECTION: Adhesive lined inside the 3:1 heat shrink connector will exude hot melt adhesive when evenly heated, shrinks quickly and adheres to wire insulation. Guarantees good environmental sealing, waterproof and wear-resistant ERGONOMIC COMFORTABLE HANDLES: The nylon, non-slip handle ensures comfortable and swift operation. There is a