Application: general purpose. Die construction: two-piece die set, die style: two-piece die system. Hand of cut: right. Material: carbon steel. Measurement system: Imperial. Surface condition: bright. Tool size: 5/16-18 UNC. Collet size: a1, #1 or #5. Outer diameter: 1.25-Inch, 2-inch or 2.75-Inch; outer diameter (metric): 31.75mm, 50.80mm or 63.50mm.