Tandy Leather Factory-Pro Stitching Groover Set.This product design makes perfect sense.Unlike most groovers, this blade is on the same axis as the handle, providing better control and downward pressure on the blade.The chuck easily locks the blade firmly in place.More than just a groover, it also comes with a small modelling spoon for creasing or decorative borders.Groove width adjusts from 1/16" (02cm) to 1-7/16".