This is a set of hole-punching dies for a punch-style hand press. Please note that the hand press is not included. This set includes 6 sizes: 2, 2.5, 3, 3.5, 4, and 4.5mm. You can punch holes in fabric and leather with almost no noise. We have received many positive reviews from customers. Since it is used with a hand press, there is almost no noise. You can punch holes without worry, even in apartments late at night! I tried punching a hole in 5mm saddle leather, and it made no noise, and even a woman could easily punch a hole. You can easily punch holes in hard fabrics like canvas and acrylic tape. It may not be suitable for thin fabrics. If you want to use it on thin materials, please use it with some ingenuity, such as placing cardboard underneath. Please use it with a hard material underneath, such as a hard rubber board or a cutting mat. In some cases, you may not be able to punch holes properly with a soft, thin rubber board. It is easier to punch holes if you have some kind of lower die attached, as it prevents the rubber board from bending. If the rubber board is soft or bends, you may not be able to punch holes properly. *This is only for the punching dies (blades). The hand press, rubber board, leather, etc. shown in the photos are not included. It is compatible with general hand presses sold for leathercraft. It can be attached to Japanese-made hand presses that can use general leathercraft dies (such as rivets). The press machine has more than enough power, so you can punch holes with a light force, as if gently tapping the arm of the hand press. If you pierce through with strong force all at once, the hole will become larger. *Although the mounting screws do not fit perfectly, they will catch by about 1-2 threads when you screw them in, and you can fix them without any problems. *Screws that fit perfectly cost 10,000 to 20,000 yen per hole. This is not such an expensive product, so please understand that the screws may not fit perfectly. This is a mass-produced product, so please do not buy it if you are particular about the screw dimensions. It will cause trouble. The hole diameters are the nominal hole diameters of the manufacturer. The size of the holes made will vary due to various factors such as manufacturing errors, how the holes are punched, and the material. This is the same with commercially available punches. We cannot guarantee the exact size of the holes for each material. We do not accept complaints, gripes, returns, or exchanges regarding misunderstandings of the explanation.