Rec-mounts Saddle Rail Mount for Contour Roam Roam2 for contour ROAM ROAM2 Come off adapter & 1/4Tripod There's a hole Supports up to rail spacing 43mm-44mm Supports up to rail diameter 6.5mm-9mm CNC Machined 6061 T6 Aluminum 42g contour Adapter ABS 9g use strap for prevention falling facebook https://www.facebook.com/recmounts http://www.an-y.com/img/rec-mount-catalog3.pdf