Needles > 135x16 DPx16
Schmetz 135x16 SY3335 DPx16
Sewing machine needles to fit industrial walking foot machines. These needles are designed to punch through Leather Plastic canvas and the heavier materials. Size is the diameter of the needle. The bigger the size, the bigger the hole that is made.
RTW-LR All types of Leather ***(most commonly used)
DIA - Diamond point - Heavy Duty Dry Hard Leather
SD1-Tri tip point - Fine Leather Imitation Leather , Films , Plastic , Hard Fibers
D Tri - Triangular Point - Hard dry Leather, Cardboard , pressboard, paper.
NW - Narrow Wedge Point - All types of leather - bags shoes belts
Schmetz Cutting Points PDF
12-18 (80-110) - Lighter leather/canvas
19-23 (120-160) - Standard material - most common size: 130
24-25 (180-200) - Heavy leather, multiple layers of canvas