1.use: for leather wooden drum;
3.effective use,long service life;
4.two size:M16 used for small wooden drum(2800,3000,3200,3500mm)
M24 used for big wooden drum(4000,4200,4500mm)
5.for details, please see the drawings.
6.if you don't know which size you need,please let us know the thickness of your wooden drum,we can suggest for you.