Description Brew City Sport Track Mount 42°:  The Brew City 42 Degree Sport Track Mount quickly attaches to boats that have gunnels with integrated 42 degree sport tracks. The t-bolts go into the sport track and is secured by turning hand friendly, easy to turn knobs. This mount is predrilled with the Brew City base hole pattern. 90°:  The Brew City 90 Degree Sport Track Mount quickly attaches to boats that have gunnels with integrated 90 degree sport tracks. The t-bolts go into the sport track and is secured by turning hand friendly, easy to turn knobs. This mount is predrilled with the Brew City base hole pattern.