Rennsteig 9R 471 901 3 Screw Extractor Double Edge Set in Metal Case, Size 1-5, Black Set contains size 1-5 screw extractors in a metal case, great for storage Four double-edged cutting/gripping edges for 8 points of contact For both left and right hand threads Non-slip engagement removes even the toughest frozen bolts Tip has a center point so no additional center punch is required when centering the drill hole