The HIKER H-901 hand press offers all the versatility you'll ever need from a hand press. The die are interchangeable, so you can insert several types and sizes of grommets with the same press; the lower die is adjustable, which provides a consistent, quality setting in various material thicknesses - no moreguessing when to stop pushing the handle down!; and the HIKER H-901 was designed to produce up to 6 times more cutting and closing pressure than other competing presses. That means that the H-901 requires up to 6 times less human effort to insert a grommet! Flat washers; turn-over washers; spur washers; thin material; thick material; whatever your needs are, the HIKER H-901 hand press is the best hand press available.