Evolution Gun Works HD Picatinny Scope Mount Ruger No. 1 B & S Contour 80421. Mounting Hardware:#6-48 X 1/4 Screws and T-10 Bit IncludedTorque Specs: 20 in/lbsCenter Spread:3.01"Overall Length of Mount:6.670"Standard vs. HD railsThis mount fits:Ruger...