Good little hammer to check reflexes in a first aid kit. I got one to round out our home first aid kit - I suppose that as a former paramedic, I got a little carried away. This would be perfect for a child or medical student. It's a nice quality, low cost way to check reflexes. I don't anticipate having to check reflexes on a regular basis...but if I ever do need to do it, I'll have the percussion hammer. I guess I'd rather have it and never need it, than not have it and need it just once.