Made from alloy, these tools are and long-lasting. The precisions design ensures that your guitar's frets will be installed perfectly everytimes. It is great for guitar repair shops, music store, and anyone who wants to keep their guitars in top conditions. Use this fret press set to install new frets or replace old on your guitar with ease. Great for electric guitar/bass luthiers . Easy and accurate fretting on different radiused fretboards. This set of guitar fret installation tools includes a fret press caul, wrench and 3pcs Brass Fret Inserts making it an essential tool for any guitar enthusiast.