This is a Simpson Strong-Tie LS70 6-3/8-Inch Reinforcing Angle. Note: The image here is for the series. The actual item may not be an exact match with the image shown, but should be similar. See
FEATURES
General utility-reinforcing angles with multiple uses
Field-adjustable angles from 0 to 135 allow for attaching members intersecting at angles
Perfect angle series for many household repairs and DIY projects
