The basics These Gutermann Serger mini-cones are especially for use on overlock machines.  The benefits This is a particularly economical make-up, which can also be used for all kinds of sewing on standard sewing machines. Sold in 1094-yard mini-cones. The uses It is the ideal thread for problem-free and uninterrupted sewing on 3-thread and 4-thread overlock machines.  The bottom line Representative color samples are on the next page. Indicate the number of spools of each color you want and then at the bottom of the page hit 'Add Selected Colors to Cart' and everything you choose will be added at one time.