This battery dial is for replacement purposes only, sold individually. This battery dial fits the front folding hinge joint of the MagSHOCK® model. If you need battery dials for both sides of your MagSHOCK®, then order two. For example: 1 dial = $8, 2 dials = $16. This battery dial does NOT include the attachment bolt, which is located inside the battery sleeve housing. That battery dial bolt can be found under the bolts replacement parts.