Includes two 0.25 in.-20 tpi bolts Use to attach telescope with Vixen Tube Rings or third party rings with 0.25 in.-20 tpi threaded holes Other devices such as a camera can also be attached Interchangeable with the GP tube plate Furthest holes are 6.3 apart and center holes are 1.4 in. apart All holes pas 1/4-20 bolts and are smooth non-threaded 5-Year warranty 7.5 in. L x 1.7 in. W x 1 in. H (8 lbs.)