Quality of serger thread varies. Some is fine to piece with, some is not as it is not strong enough and you risk your piecing falling apart. Best bet is to find some reviews on the specific brand and do a search for the manufacturer and see what they intend your specific thread to be used for. I personally would not use that thread for piecing and maybe even for serging until I checked it out. I have in the past bought some very bad serger thread.