Tama MHA823 Hi-Hat AttachmentThe new and redesigned Hihat Attachment allows easier and more flexible positioning of a Hihat Stand on a Double Bass Kit. The MHA823 is attached to the rim of the bass drum with a mounting bracket; the omni ball holder keeps the hi hat machine upright and secure without having to open and spread the feet. Features Omni Ball adjustment flexible set up of a hi hat machine on a double bass kit works up to a diameter of 15. 9 28. 6 mm