Prime-Line Stainless Steel Mortise Lock For Patio Sliding Doors Constructed Of Wood, Aluminum, and Vinyl, 3-11/16 Inch, 45 Degree Keyway, Silver,

This is a screen retainer spline designed to be use for securing various types of screen fabric into a window screen or screen door frame. 0.155 in. (5/32 in.) in diameter. It is a top quality round, serrated vinyl with a hollow core. Black in color. 25 ft. roll.