DB Needle Characteristics

• Most needle shanks, or the top of the needle that is inserted into the machine, have a round front and a flat back. DB needles have a completely rounded shank and are available in more sizes than standard needles. DB needles are available with larger or smaller shafts, depending on the stitch being performed. These needles are used in industrial-strength machines and are designed to withstand breakage at high machine speeds and still provide accurate, even stitches.
  
  

HL Needle Characteristics

• HL needles have a flat shank that allows for easier insertion into the sewing machine. HL needles are like standard sewing machine needles because of their shape, but they are specifically made for use with HL-compatible machines. These needles are 50 percent stronger than most household needles, making breakage during high-speed stitching less likely.
  
  

DB Needle Uses

• DB needles are made specifically for use with DB industrial-strength sewing and embroidery machines, which have the letters "DB" in the description. It is not possible to use a DB needle in a standard sewing machine because these machines are compatible with needles that have flat, not round, shanks. Industrial sewing machines provide a faster stitch speed and more consistently perfect stitches. Special DB needles are used on embroidery machines to easily penetrate leather and vinyl. The DB needle is ideal for leather work because it slices through the material, leaving a clean-cut hole instead of an irregularly shaped hole.
  
  

HL Needle Uses

• Use HL needles to sew through hard or thick materials, such a jeans or quilting. HL needles are compatible with HL machines that accept flat-shanked needles, and their flat shape makes it easier to insert the needles into a machine. Machines with HL needles provide the quality stitches and speed of industrial sewing machines, but they are more convenient for home use because of their small size. HL machines are also quieter than DB machines because they do not use a separate, industrial-strength motor.