This is a drumstick holder. I think to attach this holder to the hi-hat stand (diameter: 28 mm). The other 2 holes is for the stick: the diameter is 15,4 mm (for 5B stick). The small holes aren't perfectly circular, so the stick will not fall off. There are 2 files: one is normal and one have RVB write on it. The height is 12 mm, I think that it is enough resistant (use 50% or more fill density). Tell me if it works! Thank you! ENJOY!