Contains stainless steel thread inserts used to repair stripped threads. The inserts are contained in a sturdy, clear, plastic display box and marked with part number and thread size. No. R1185-4 thru R1185-8 is back-up stock for display No. 5820, inch coarse display; No. R1084-5 thru R4649-10 is back-up stock for display No. 5830, metric coarse display.