100 Pack, 3/4" x 1/4", Aluminum, Metal Miter Cut Screen Frame Corner, Gauge .040, Use On 3/4" x 1/4" Screen Frame, Concealed Screen Corner Designed To Fit Into Aluminum Framed Screens Constructed With 45 Degree Mitered Cuts, Provide Durability & Longevity, Used To Repair Or Construct New Aluminum Framed Screens.