Average quality at best, slightly loose tool design making it difficult to use when trying to hold the tool in the jig punch. I was able to complete the adjustment with the tool, but it's definitely a knuckle tool. Luckily I won't be needing this tool very often so if I need it again my hand will be healed and it was cheap so I kept it but I will say if I had to use it on a regular bass guitar I would look elsewhere.