A system for adjusting an adjustable ossicular prosthesis including an ossicular implant and an adjusting device is provided. The ossicular implant includes a first fixation element, an elongated member extending from the first fixation element with a plurality of notches, a receiving member receiving a portion of the elongated member, and a resilient arm coupled to the elongated member. The resilient arm has a locked position fixing the receiving member relative to the elongated member and the length of the implant, and an unlocked position. The adjusting device includes first and second arms having first and second sets of jaws coupled thereto, the first and second sets of jaws configured to selectively engage the implant, the second set of jaws being configured to position the resilient arm in the unlocked position when engaging the receiving member of the implant, and an adjustment mechanism to adjust the length of the implant.