This newly released Heavy Duty Singer Sewing Machine, the 4423, will allow the home sewer to sew thru Vinyl and leather with ease plus between 9-12 layers of denim fabric. Repairs to horse blankets and tarpaulins are made so much easier with the use of the Singer 4423. Dont be deceived by the name of this machine being heavy duty it is actually a very lightweight machine to transport and utilize. Apart from sewing all your heavier fabrics the Singer 4423 is also a easy to use for all your home dressmaking needs. A great dual purpose sewing machine, the Singer 4423.