chisels
chicago latrobe 65007 extractor screw 4
screw extractor size 4 drill size 1 4 inch large end diameter 5 16 inches small end diameter 3 16 inch taper length 1 inch overall length 3 inches for removing pipe 1 8 inch for removing screws 7 16 to 9 16 inch br b features b ul li application removing broken screws bolts and other threaded parts li li drill size in . 1 4 li li item spiral flute screw extractor li li large end dia . in . 5 16 li li material carbon steel li li overall length in . 3 li li size 4 li li small end dia . in . 3 16 li li taper length in . 1 li li for removing pipe 1 8 li li for removing studs bolts screws 7 16 to 9 16 li ul