Securely holds RAILBLAZA accessories. Allows for the easy attachment of accessories such as rod holders and GPS stands to your boat rails. Can be clamped to both round AND square 32 mm (1.25 in) rails, and to 41mm (1 5/8′′) round rails This marine rail mount is ideal for those who need to utilise it for holding different accessories, or those wanting to change the location of their Rod Holder II, Fillet Table, or GPS Three Axis Platform. The RailMount is simply screwed together with no drilling required so that it can be easily moved to a different spot, leaving your rail as good as new