This clay shovel is designed for use with Makita jackhammers ( or crushers).This is a necessary tool when landscaping loam or sandstone in hard formation.If you are planting 1 gallon or larger plants in hard soil this is an amazing time saver.This particular jig is obviously one to use as well Tool for when you need to dig foundation trenches for retaining walls in tough ground conditions Any old spike will break up hard materials, but a shovel will help you keep your foundations the right size and with straight edges.