GrovTec heavy duty push button swivel bases allow the user to position a sling attachment point wherever it is needed for the preferred sling. The 9/16-18 threads screw into wood or synthetic stocks and allow a standard push button sling swivel to be attached with ease. Made from stainless steel and finished with a non-glare black oxide finish, these bases deliver exceptional strength and security, allowing multiple swivel positions to be added to any synthetic or wood stock firearm. Accepts any GT push button swivels.