Schmetz Quick Threading Needles are universal/general purpose needles for effortless threading. Formerly known as Handicap Needles. Not for use with sensitive fabrics (like 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. Quick Threading Sewing Machine Needles, sold in sets of 5, size 90/14, from Schmetz.