At a Glance:
Stripped or missing screws cause such large headaches for being such small parts. These T10 torx head, #6-48 thread, .160" thread length screws directly replace the factory picatinny rail screws with an upgraded torx head to prevent stripping or camming.
The length of these screws dictates they only be used with Ruger® factory optic rails. This ensures the screws do not protrude to the inside of the receiver in an effort to avoid interfering with the bolt. For best results and proper thread engagement, you should torque the screws to Ruger® factory specifications.