Resin infused bamboo chime beaters
I made a pair of these for myself about 4 years ago. They have really worked well and I’ve gotten a lot of good feedback from colleagues. I’ve used them on Tchaikovsky, Shostakovich, Bernstein, etc...great at all dynamics.
The material is incredibly hard. There is a warmth and feel to it though because of the wood/bamboo material versus plastic.
Carbon fiber shafts with silicon rubber grips or natural bamboo. Limited supply as the material is hard to come by.