Shubb Dobro Capo. Call it what you will, Dobro?, Resophonic?, or resonator guitar, square-neck guitar, some used to call it a hound dog guitar. If your string action is at lease 3/8" --- in other words too hight to fret with your fingers, and you play with a bar --- this is the right capo for you. The Shubb clamps solidly to the neck to provide great tone. It uses the same patented locking action of our Shubb guitar capo, and it aligns by touching the fret, not by eye, making it fast and accurate.