This basic round hollow punch cutter comes with carbon steel material, featuring high hardness, sharpness, and good tempering. It has a wide groove design for easy discharge and smooth punching. The set includes 6 pieces of commonly used sizes, suitable for sewing holes, installing rivets, buttons, and screws. It can be used to penetrate leather, rubber, paper, card, canvas, and scrapbooking paper. Highly recommended for DIY handbags, flexible plastics, clothing, vinyl, cardboard, webbing, jackets, or poster boards.