Self-adjusting terminal wire cable crimping pliers are a specialized tool used to crimp (compress and secure) connectors onto the ends of electrical wires. The specific model you mentioned, SN-01BM AWG28-20, is designed to work with a variety of connector types, including dupont, PH2.0, XH2.54, KF2510, JST, MOLEX, and D-SUB.

AWG28-20 means that the tool is designed to work with wire gauges between 28-20 American wire gauge (AWG) which is commonly used in electrical wiring.

These pliers have a self-adjusting mechanism that automatically adjusts to the size of the connector, making it easy to use and ensuring a consistent, secure crimp every time. They are commonly used in electronics repair, wiring and installation of appliances, cars, and many other applications.

The Self-Adjusting Terminal Wire Cable Crimping Pliers is a type of hand tool used to crimp (squeeze together) the metal connectors on the ends of electrical wires. These pliers are designed to work with a variety of connector types, including Dupont, PH2.0, XH2.54, KF2510, JST, Molex, and D-SUB, and are suitable for use with wire gauges ranging from AWG28 to AWG20. They are typically used in electronics and electrical work to make secure, reliable connections between wires and devices.

The components of the ratchet crimping are made of special steel.
Wire electrical discharge machining cutting jaws with perfect polishing.
Designed according to human factors engineering,it can save 50% energy when crimping.
Precise crimping die sets and integral lock with self releasing mechanism ensure high-quality crimping effect after crimping repeatedly.