Check the listing for details. Recoil 5/16-18 x .562 9/16" long Helicoil type Thread Inserts 20 pack. Condition: New – Open box. Listed at 12.50 USD. Recoil brand 5/16-18 x .562 9/16" long Helicoil type Thread Inserts 20 pack. These were originally bought in bulk and do not come in retail packaging. I have used these exact inserts in my shop for over 20 years and they are top quality and work great. My shop needs to move some inventory that I have extra. Shipping is actual cost with no extra cost, what you see is what they charge me. They keep raising rates multiple times a year now.Due to the on going pandemic there can be extended ship times with delays that are 100% the problem of the USPS. Ebay does not add any days to the extended delivery time so the estimated delivery date they list is not accurate and they wont update it with information on delays due to the pandemic. If you experience extended delivery times PLEASE contact your local post office.