GripEdge Patented RPT Hex geometry delivers up to 50% more torque on new fasteners and up to 400% more torque on damaged fasteners vs standard tools RPT Hex geometry is engineered to replace conventional tools by preventing the rounding of good fasteners and effectively removing damaged ones Low-profile dual-action drivers measure just 7/8” (22mm) in length, while maintaining a full-length tip across most sizes to ensure complete contact inside fasteners Multiple drive options: 1/4” internal square and 7/16” (11mm) external hex Large laser etched size markings for greater visibility One-piece S2 steel construction for increased strength and durability Each set is packaged onto our second-generation aluminum rail Sizes Included - 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm & 10mm