This is a household sewing machine. Some fabrics have a lot of friction between the metal press and the surface of the fabric which can cause poor shipping if pressed with a press clasp. The Teflon reinforcement bottom is very slippery "Teflon" which allows for smooth sewing of vinyl, oil cloth, leather (mirrored leather), imitation suede and more. Quantity: 1 piece; Size: 1.3 x 0.6 inches (32.5 x 15 mm); Attachment to the sewing machine: 0.2 inch (6 mm); Please check whether it is compatible with your sewing machine; *Not screw-type compatible with Brother, JUKI, SINGER, JANOME, baby lock, etc. *Compatible with many household sewing machines. It may not be compatible with old fashions. Product Name: Sewing Machine, Teflon, For Household Use, Attachment, General Purpose, Teflon Treatment.