Rennsteig Screw Extractor Set Dual Edge 3 Pc 4719033 Piece Size 1 3 in plastic tube The new generation of screw extractors, tapered flute design (patented) High strength steel for greater resistance to breaking and rounding out For unscrewing ruined screws and bolts and damaged threads Can be turned into clockwise or counter clockwise direction (for right and left hand threads) Extractor being driven into the bore holes for firm and safe hold With centre punch pin Non slip and dual edged engagement