The TRUGLO Rifle sight set replaces existing factory sights. Full windage and elevation adjustment. CNC machined. Not for carbine barrels. Front diameter is .060″; rear diameter is .035″. It fits Winchester 94 with front ramp, Henry Golden Boy 22LR, Marlin Lever Action Guide Rifle with front ramp. Features: – Replaces existing factory sights. – Full windage and elevation adjustment. – CNC machined. – Not for carbine barrels. – Front diameter is .060″; rear diameter is .035.