Thank you for viewing. This is a set of two metal control knobs for guitar/bass and one hex wrench. They were installed on a guitar used at home. The dents visible in the product images appear to be part of the product's specifications from the time of purchase, but please refrain from purchasing if you are concerned. I have used them with care, but please understand that they are used items and consider purchasing after confirming the product images. Product Specifications The following is an excerpt from the product description at the time of purchase: QPARTS metal knobs for guitar Metal knobs for guitar ■ Purple Abalone ■ Gold ■ Compatible shaft diameter: Approximately 6mm