The Dr, Slick Brass Bobbin Threader takes the hassle out of this necessary tsk that at times can be so frustrating! The fine spring steel wire end slips easily into your bobbin tube without damaging it. Pass your thread end through the extra wide loop at the end and draw the tool back to complete the job. The butt end is tapered so can be used as a half hitch tool. 5.5 inches long, brass handle.WARNING: Cancer and Reproductive Harm -www.P65Warnings.ca.gov