Feature:1. 3 Specifications: This kit includes 3 different specifications of spring steel extension bar, respectively are 1/2in, 1/4in, 3/8in to meet the needs of different situations2. Function: The extension holder can easily attach the narrow places that are difficult to attach by ordinary screwdrivers, easy to use3. Tight Connection: The functional head is equipped with lock and magnetic device to ensure that the holder does not fall off4. Spring Steel Connecting Rod: The extension holder is made of high quality spring steel material, has high hardness, bendable and durable5. Application: The flexible extension bar is suitable for all electric drills and wrenches, for car engine repair, etc.Specification:Item Type: Flexible Extension BarMaterial: Spring steelExternal Treatment: Phosphate BlackSpecification: 1 x 1/4in1 x 3/8in1 x 1/2in.Package List:3 xFlexible Extension BarNote:Pay attention to safety protection when using.