The DiversiTech 17638 is a 1/4 in. thick 2 hole open 45 deg corner angle for joining strut and accommodates up to a 1/2 in. bolt. It is designed to be used with 1-5/8 in. strut channels. Strut corner angles are used to connect strut at 90 degree angles. DiversiTech's strut accessory product line contains a broad range of nuts, clamps, hangers and more for a multitude of customized metal framing and hanging applications.