Durability can be determined after prolonged use. Though apparently appears sturdy & strong but grip is very strong takes efforet to fix & remove mobile. But good for safety it will not come out by itself. In a good versatile tripod like shown in photoit can be placed in any position with any screw mount portrate or landscape. Appears satisfactory product. Full marks so far. Time will tell more. Cost seems little high. It should be less than 100 not more in any case.