Stainless Steel Base Cover Slim for Square Posts of 1.57"x1.57" 

This item is used for covering up the bolts used to either mount the bottom of a post or to end a handrail into a wall.

See BOB-FL as an example in our Gallery 

With wall flanges that need to be covered, please refer to the Stainless Steel Pivot Flange for Square Tubing or the Stainless Steel Base Flange for Square tubing

Outside dimensions are 3 3/8" x 3 3/8" (see second picture for a drawing)