The Sparrowhawk is a signature guitar for Bill Kelliher of Mastodon. It features Seymour Duncan Distortion pickups, coil-splitting controls, and a maple-capped mahogany body. The guitar has a set-thru construction, three-piece mahogany neck, and an ebony fingerboard with block inlays. It also has a TonePros locking TOM bridge and tailpiece for stability and sustain.