Universal needle with a slip-in threading slot in the eye. Fabric Use: Numerous - wovens and knits. A general purpose needle for effortless threading. Formerly known as a Handicap Needle. Not for use with sensitive fabrics (i.e., silk, microfibre, etc.) because the slot might create pulled threads. It should also not be used for quilting as the fibers of the batting might be pulled out. Not recommended for use with Denim as the structure of the needle eye is too weak.