【Further reduces friction loss when used in addition to spring roller bearings!】 Recent high-end drum pedals feature a swivel mechanism at the lower end of the spring, further reducing friction loss. I wanted to incorporate this swivel mechanism into the FP720, so I created a spring post with a built-in bearing. The hole in the stainless steel "denden bolt" has been enlarged, and a NSK Micro Precision stainless steel bearing has been inserted. It can be installed on the following models. (There are other models that can be installed. Please inquire in the comments section.) YAMAHA FP720 Pearl P-930 Pearl P-920 TAMA HP310 TAMA HP200 TAMA HP50 ★Here's a video comparing before and after replacing with the bearing-integrated spring post. https://youtu.be/X__k2yzpW_4?si=3_RHVirhWjCvpI1i ●Be sure to use it after bearing-izing the spring roller. (The reduction effect of friction is much greater with the bearing-ized spring roller than with the bearing-integrated spring post.)