I guess this would be OK if you didn't move your guitar around much. But if you go over a friends house with your guitar, or put it in your car, or move you guitar from house to house, or floor to floor, or gig with it, the tuner doesn't clamp securely enough to stay on the guitar. I lost both tuners within a couple months. They probably slipped off as I was transporting the guitar. I'm going to look for the ones that fasten on the nut because these don't stay on. I don't recommend these.