Gen-Y CONTRACTOR TORSION-FLEX Channel Mount Trailer Coupler 1K - 1.7K TW 16K Towing Model GH-10001Gen Y CONTRACTOR TORSION FLEX Channel Mount Trailer Coupler 1K 1. 7K TW 16K Towing Model GH 10001 The Contractor Torsion Flex Trailer Coupler is an adjustable coupler compatible with most channel mount couplers. Fabricated from heavy duty steel and rubber torsion flex cords, this product eliminates shock transfer while remaining virtually maintenance free! This coupler has no airbag to maintain, no bearings to crush or wear out, and has a tongue