The bass d hole rings tool is an economical and practical auxiliary hole opening accessory. It can not only assist in opening holes, but also protect the d skin holes, prevent the d skin holes from cracking, and has a certain decorative effect. Opening a hole can increase the volume of the kick d by 20%, the sound is more prominent and the impact is obvious, and the bass is significantly improved. In order to obtain a more realistic recording effect, it is usually necessary to open a hole on the d skin of the kick d , and then use a d microphone to pick it up at the hole. sound, or put more mics inside to get low frequencies. Process: electroplating For 6-inch d kits Colour: silver Material: nylon Package Contents: 1 x D kit bass d hole ring Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.