The Rennsteig Tools 5 pc. Double Fluted Screw Extractor Set extracts ruined screws without damaging threads. Contains a unique design to allow both left and right-handed turning. Integrated center punch pin for precision work. Dual-edge engagement with the screw for a secure grip. DESIGN: tapered flute design and made of high-strength chrome vanadium steel and center punch pin for greater resistance to breaking and rounding out. UNIVERSAL TOOL: nonslip and dual-edged engagement with the ruined screws and bolts without damaging threads, can be turned in clockwise or counterclockwise direction (for right-and left-hand threads). HOW TO USE IT: unique hex shank design works well with all standard hex sockets and extensions or box wrenches, eliminating the problem of rounded corners. QUALITY: industrial quality with burnished, cutting edges polished. VERSATILE: sizes 1-5 (3/16 in. to 3/4 in.) in a vinyl pouch.