The blister contains 4 perforations of different sizes, ideal for adapting to different drilling needs.The hole punch is equipped with a comfortable and easy-to-grip handle, which allows you to exert the right pressure when drilling.The bottom of the tunnel is non-slip, ensuring stability during use.The saw blades are sharp and resistant, ensuring clean, burr-free drilling.This product is perfect for use both at home and at school, and represents an essential accessory for offices and design studios.