Wire Crimper: The crimper tool is designed to crimp 24-14 AWG non-insulated open barrels, OEM-style terminals, and wire splices. It provides the perfect crimping service for the open terminal connector you buy (You may be lucky enough to receive a red storage box.) Precision Crimping: The wire crimper features an automatic adjustment ratchet mechanism and an adjustable locking device for precision. It has dual crimping stations that simultaneously crimp the wire and insulation in one operation All-rounder: Thanks to the Three different jaw sizes, can be applied to crimping 2.8mm, 3.5mm, 3.9mm, 4.8mm, and 6.3mm pitch open barrel terminals from Molex Standard .093"/MX150/MLX Crimp Terminal, AMP - TE CONNECTIVITY Mate-n-Lok/FASTON Connector, etc Wiring Safety: Male and female spade terminals are made of high-quality tin-plated red copper, whose surfaces are plated with tin which ensures good conductivity and corrosion resistance. Use with matching crimp terminals for safe use Brass Terminals: Male/female spade connectors can easily connect and pull apart. Kits include Non-Insulated Piggyback Connectors - Butt Connectors, and male-female spade connectors of sizes:0.110"/0.187"/0.250", different sizes can meet your various needs Application Projects: The wire crimping tool spade bullet connectors kit can be widely used for home appliances, auto, audio systems for battery or rocker switch quick connecting/disconnecting, motorcycle, scooter, auto, car, truck, boat, Arduino, 3D printer, PCB, jumper wire and other electronic DIY projects, etc