Powerbuilt 640844 3/8-Inch Drive Extension Bar Set, 4-Piece Made to be the most reliable tools in the market today Tool solutions for most all situations Built to exceed tool standards Includes 1-3/4, 3, 6 and 8-Inch extensions Mirror polished chrome vanadium shaft with knurled center Dual grease rings on female end for added grip Meets or exceeds ANSI standards Lifetime warranty