National T Plate 4x4 Black is expertly designed to join two pieces of wood together at a 90-degree angle, making it i for screens and frames. This durable T plate features countersunk screw holes for a flush finish and requires a pilot hole drilled with a 3/32 inch drill bit when using wood screws. Crafted from hot-rolled steel and zinc-plated, it ensures long-lasting strength and resistance to corrosion, providing reliable support for your woodworking projects. Model Number: 1161BC