Spinal Clock is the twenty-eighth studio album by avant-garde guitarist Buckethead. The title may refer to Buckethead's back injury in April 2010. It is his first solo album released since then.The album was announced and available for pre-order on August 25 via the TDRS Music page, suggesting a release date on or near September 15. Eventually the album was released on September 16, when 350 signed copies of the album were sent out.