THESE ARE 5/16 DIAMETER----PLEASE MEASURE YOUR EXISTING PINS BECAUSE THE MAJORITY ARE 1/2 DIAMETER WHICH I ALREADY HAVE LISTED TOO--ALL ARE EXTRUDED ALUMINUM W/STAINLESS STEEL THUMB SCREWS-ANY OTHER QUESTIONS PLEASE CONTACT ME IM A HURRICANE SHUTTER CONTRACTOR ONE TIME FLAT SHIPPING OF .50 REGARDLESS OF AMOUNT ORDERED