• Four double edged cutting/gripping sides.
• 8-Points of contact to make non-slip engagement with the bolt/screw.
• Ensures removal of even the toughest bolts/screws.
• Contents: #1; 3.2-4.2mm(3/16"-1/4"), #2; 4.8-7.1mm(5/16"-3/8"), #3; 6.4-9.5mm(7/16"-1/2"), #4; 8.7-12.7mm(1/2"-9/16"), #5; 11.1-15.9mm(5/8"-3/4").
• Supplied in storage case.