Even the tiniest hairline crack in high end musical instruments can destroy tonal quality as well as their value. I have used these Glue Applicators to repair tiny cracks in acoustical instruments and to preserve others. I am very satisfied with the results.
Works very weell. Use it often. I put just enough glue in the unit to do the job and i keep a small cop of waterr handy to clean out the needle as soon as i finish using it. this allows me to use the needle several times. More than ten projects so far with the same needle.