On Stage SSP7850 Pro Speaker Stand Set Brackets mount to any speaker cabinet without drilling holes in your cabinet Use the 1 3/8 inch diameter upper shaft or the included exterior mounting bracket to fit most speaker cabinets 8 preset height adjustment holes adjust the stand from 46-74 inch Steel mid-point locking clutch with added security pin Friction locking/retractable leg housing for quick and easy set-up and tear down