This shim kit is used with our offset strap hinges and New York style hinges. The shims are mounted behind the hinge pintle plate to increase its offset. You can use either one, two, or all three shims depending on what is needed for your shutter application. The total throw of the hinge-pintle combination is also increased. This can expand your mounting options and provide more clearance for trim, storm windows, or other obstructions. Screws included.