5-piece set. Used to extract broken bolts, screws or studs from M6 to M20. With left-hand loosening spiral. For drill sizes 7/64" (2.78mm), 9/64" (3.57mm), 5/32" (3.97mm), 1/4" (6.35mm) and 19/64" (7.54mm). Supplied in plastic case. Dimensions: 35mm x 80mm x 160mm.