Channel Lock And Wiggle Wire!
Used to affix poly to greenhouse hoops and base boards!
 
Each channel is 6.5FT long and galvanized to last longer in humid conditions.
 
Included with each channel is a wire that sandwhiches the poly in channel to hold plastic in place. 
Wires are also 6.5Ft long, galvanized and plastic coated on the ends to eliminate tears in poly cover!