Easy installation ; QH-36 is a 36 pack
Stainless steel and weather proof ; The loop itself is 7/16", but the opening is 5/32"
Leave in year after year ; The overall hook is 1.85" and the thread itself is .75".
Wind proof and rust proof
The screw end is 3/16" diameter or #10. However, when pre-drilling you would need to use a smaller hole so a 1/8" drillbit is recommended.