Large Sampo Ball bearing Swivels #8 size 500lb strength.Sampo Ballbearing Swivels. If you want the best, use Sampo Swivels. Falconers have been using them as a favorite around the world. We carry four different styles of these sturdy, stainless steel, ball bearing swivels. ( The large size # 8 Sampo swivels have a strength of 500 pounds.)This is the recommended size swivel for using with large falcons, Red tails and Harris hawk size birds. 502 large sampo swivel with large rings #8 size. $6.95 each. To buy swivels at discount pricing view our listed prices below.502 Large Sampo Ball bearing Swivels #8 size 500lb strength. Swivel length is 2" long. Swivel loop is 1/2" diameter.