Specification:Item Type: Screw ExtractorDrill Bit Size: 5/64in 7/64in 5/32in 1/4in 19/64inScrew Extractor:＃1 ＃2 ＃3 ＃4 ＃5Package List:5 x Drill Bit5 x Screw ExtractorNote:When using, choose a drill with appropriate specifications, drill a small hole in the center of the section, then insert the puller into the small hole, and then use the tap wrench or adjustable wrench on the square end of the puller, and Rotate counterclockwise to remove the bolts that are damaged in the machine and equipment.