The Wire Lock system is popular for the following applications:
*Single layer of poly 4 mil, or 6 mil or larger
*Double layer poly 4 mil, or 6 mil or larger
*Seasonal application of shade material over the greenhouse
This lock system consists of an aluminum base and preformed stainless steel wire insert that holds the poly securely in place. It also comes in a shape for gable ends (fits on top of the last bow on each end of the greenhouse). The double can be used in conjunction with a roll-up side wall. The strong point of this lock is that it secures a variety of material thicknesses.