GRIPEDGE - It's All About The Grip! RPT (Rounding Prevention Technology) Star Bit Sockets are designed to completely replace your traditional Torx/Star tools. Use them the first time, every time, to prevent damage from happening. In most cases, If you come across an already stripped Torx/Star, the RPT Star Bit Sockets can grip and remove them without the need for additional tools. Replaces standard Star tools Sizes Included: - 1/4'' Drive - T6, T8, T10, T15, T20, T25, T27 - 3/8'' Drive - T30, T40, T45, T47, T50, T55 - 1/2'' Drive - T60 Features: -Patented unique bi-directional design enables loosening & tightening of new and damaged Star fasteners -RPT Technology prevents rounding of new and compromised fasteners -RPT Technology provides up to 50% more torque on NEW fasteners -RPT Technology provides up to 400% more torque on damaged fasteners -S2 steel for increased strength and durability -Oversized roll stamping and ink filled size markings for greater visibility