Bennett BOLT1212ED 12 x 12 BOLT Electric Trim Tab Kit - Edge Mount Bennett Trim Tab sizes are in format span x chord. Span is the side to side measurement, chord is the fore to aft measurement. The Bennett BOLT Edge Mount Trim Tab Set is designed with an adjustable upper hinge for transoms with limited vertical space. Tabs turn up for added strength and feature piano-hinged backing plates. Compared to other electric systems using old technologies designed over twenty years ago, the BOLT Electric