1、FIRM CLAMPING: Three jaw keyless drill chuck provide firm clamping, not easy to slip off, easy to use and very stable 2、MANUALLY TIGHTEN: Impact driver chuck can be tightened manually, which is easy to use and portable to carry, 3、GOOD CORROSION RESISTANCE: The shell of the three jaw chuck is made of carbon steel, which has good resistance to atmospheric corrosion and is durable 4、FOR PNEUMATIC, ELECTRIC AND HAND TOOLS: Can be used for the chuck of pneumatic tools, electric tools and hand tools, and can be used with drill bits, grinding heads and screwdriver heads to realize multiple functions in one tool 5、ELECTRIC GRINDER CHUCK: Suitable for electric grinder multi function chuck, electric grinder chuck, electric grinder accessories, small electric grinder clamping core, universal clamping core