Set of 5 heavy duty machine needles in assorted sizes Use for standard sewing projects on heavy fabrics such as denim, corduroy or leather Compatible with all quality sewing machines, including , Brother, and Kenmore brands (2) size 100/16 for medium weight denim, (2) size 110/18 for heavyweight cotton, and (1) size 90/14 for medium weight leather Machine needles come in slim and convenient case, marked with sizes on clear lid