This complete kit provides everything necessary to mount virtually any 1-inch or 30mm scope the correct way. Proper scope installation is critical to the accuracy of your firearm.Specifications and Features: Manufacturer Number: 545454 F.A.T. Wrench torque screwdriver 10 Gunsmithing Screwdriver Bits Bubble Level 1" scope ring lapping bar 30mm scope ring lapping bar 1" scope ring alignment Bars 30mm scope ring alignment bars Lapping bar handle Lapping compound Thread lock