Knipex 9R4719033 Rennsteig Double Edged Screw Extractor - 3 Piece Set

• Four-double edged cutting / gripping edges = 8 points of contact

• Non-slip engagement removes even the toughest frozen bolts

• Tip has built-in center punch

• Hexagonal driving head for optimum torque

• Made of High Alloy German Chrome Vanadium steel for a long life

Knipex 9R4719033 Rennsteig Double Edged Screw Extractor - 3 Piece Set. The Rennsteig Double-Edged Bolt Extractors represent a new generation of tools to easily remove damaged bolts and screws. Key Features: Four-double edged cutting / gripping edges = 8 points of contact. Non-slip engagement removes even the toughest frozen bolts. Tip has built-in center punch, no additional tool required. For both left and right-handed threads. Made of High Alloy German Chrome Vanadium steel for a long life. 5 Easy Steps: Mark the center point for your drill hole using the built-in center punch on the extractor. Drill a hole in the bolt. Drive the bolt extractor into the bore hole until the cutting edges are in full contact with the broken bolt. Use a wrench, pliers or socket to remove the bolt out of the thread hole – turn it either clockwise or counterclockwise. After unscrewing, remove the damaged screw or bolt from the extractor. Sizes Included (1-3): Size 1 Drill Diameter 1/8" - 3/16" Size 2 Drill Diameter 3/16" - 9/32" Size 3 Drill Diameter 1/4" to 3/8"