The GRI Cutter is kind of like an exacto knife but it is non-slip grip so you are less likely to slip and cut yourself (hear that Larry?:) Instead of installing single edged razor blades, it has a bar of blades that are snapped off and moved up when the razor has dulled. Automatic blade lock. The entire tool is 6" long. blades are 3/4". Good for grafting, cutting twine...multi-tasker.