A device (100, 400) for collapsing a stent frame, the device comprising: - a stationary first component comprising a first grip section and a first guide section coupled to the first grip section, the first guide section comprising (i) a first central aperture having a first central axis and (ii) a plurality of first elongate guide slots extending in a radial direction from the first central aperture; - a rotatable second component comprising a second grip section and a second guide section, the second guide section comprising (i) a second central aperture having a second central axis coaxially aligned with the first central axis and (i) a plurality of driving structures extending about the second central aperture; - an alignment mechanism configured to maintain the second central axis coaxially aligned with the central axis of the first central aperture as the second guide section rotates relative to the first guide section; and - a plurality of compression members (104, 420, 500), each comprising a contact surface for engaging an expandable implant, each compression member comprises a main body (200, 422) being slidably positioned at least partially within a respective first elongate guide slot and slidably engaged with a respective driving structure for urging slidable movement of the compression members within the first elongate guide slots as the second guide section rotates relative to the first guide section, thereby moving the contact surfaces between expanded and collapsed positions upon rotation of the second component relative to the first component to increase or decrease a size of a compression aperture formed by the contact surfaces, characterized in that - each of the plurality of compression members (104, 420, 500) comprises an axial engagement mechanism comprising an engagement slot (222, 430) and an engagement arm (220, 424), each engagement arm (220, 424) extending from an end portion of the main body of the compression member (104, 420, 500) and within the engagement slot of an adjacent compression member (104, 420, 500) to provide lateral engagement between adjacent compression members to restrict axial movement of the adjacent compression members (104, 420, 500) with respect to each other. - a stationary first component comprising a first grip section and a first guide section coupled to the first grip section, the first guide section comprising (i) a first central aperture having a first central axis and (ii) a plurality of first elongate guide slots extending in a radial direction from the first central aperture; - a rotatable second component comprising a second grip section and a second guide section, the second guide section comprising (i) a second central aperture having a second central axis coaxially aligned with the first central axis and (i) a plurality of driving structures extending about the second central aperture; - an alignment mechanism configured to maintain the second central axis coaxially aligned with the central axis of the first central aperture as the second guide section rotates relative to the first guide section; and - a plurality of compression members (104, 420, 500), each comprising a contact surface for engaging an expandable implant, each compression member comprises a main body (200, 422) being slidably positioned at least partially within a respective first elongate guide slot and slidably engaged with a respective driving structure for urging slidable movement of the compression members within the first elongate guide slots as the second guide section rotates relative to the first guide section, thereby moving the contact surfaces between expanded and collapsed positions upon rotation of the second component relative to the first component to increase or decrease a size of a compression aperture formed by the contact surfaces, characterized in that - each of the plurality of compression members (104, 420, 500) comprises an axial engagement mechanism comprising an engagement slot (222, 430) and an engagement arm (220, 424), each engagement arm (220, 424) extending from an end portion of the main body of the compression member (104, 420, 500) and within the engagement slot of an adjacent compression member (104, 420, 500) to provide lateral engagement between adjacent compression members to restrict axial movement of the adjacent compression members (104, 420, 500) with respect to each other.