movement holder with span buttonUniversal movement holder made of metal, reversible with clamping knob and quick release. Products nameVersioncalibreadditionitem No.movement holderwith tension knob10 1/2'''reversible511585movement holderwith tension knob11 1/2'''reversible511586movement holderwith tension knob13 1/4'''reversible511587movement holderwith tension knob16 1/2''''reversible511588movement holderwith tension knobETA 7750-58reversible511590movement holderwith tension knobRX 4130reversible511592