Features: 10 Piece Hollow Leather Punch Set, Sizes: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10mm Heavy Duty Steel Punch Set, Made of Heat Treated Carbon Steel for Long-Lasting Cutting Edges Special Energy-Saving Design, Can Easily Cut Multiple Layers of Fabric For Punching Holes in Gaskets, Leather, Plastic, Rubber or Vinyl Recommended for Falconry, Hobbies, Crafts, Model Making, Home Repairs, etc. Specifications Material: Heat-treated carbon steel Hollow punch sizes: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 mm Head hardness: 48-55 degrees Includes: 10 hollow punch set