Features: 1.The product is made of stainless steel,and thus is corrosion resistant and has high strength, and is durable. 2.The product can be used for making the hem of garments, suitable for industrial sewing machine. 3.This product is suitable for lockstitch sewing machines and computer carts. 4.No need to change the presser foot and teeth during use, which is convenient and practical 5.The product is suitable for wrapping non-woven fabrics and ring-shaped edges for suit bags. specification:Item Type: Sewing hemmer s: Approx. 20mm / 0.79in, 22mm / 0.87in, 24mm / 0.94in, 26mm / 1.02in, 28mm / 1.1in, 30mm / 1.08in, 32mm / 1.16in Scope of Application: 1: Suitable for all brands of sewing machine and computer controlled lockstitch sewing machine 2: Suitable for multi-function sewing machine 3: Suitable for old-fashioned pedal sewing machine In and Out Unit Size: In: Approx. 20mm / 0.79in, Out: Approx. 5mm / 0.2in In: Approx. 22mm / 0.87in, Out: Approx. 5.5mm / 0.22in In: Approx. 24mm / 0.94in, Out: Approx. 6mm / 0.24in In: Approx. 26mm / 1.02in, Out: Approx. 6.5mm / 0.26in In: Approx. 28mm / 1.1in, Out: Approx. 7mm / 0.28in In: Approx. 30mm / 1.08in, Out: Approx. 7.5mm / 0.3in In: Approx. 32mm / 1.16in, Out: Approx. 8mm / 0.31in PackageList:1 x Sewing Hemmer2 x Screw