Abstract: Embodiments are directed to devices for removing material from interior walls of vessels such as during atherectomy or thrombectomy procedures where the devices includes an ablation tool and at least one ablation tool stabilizer that can be used to radially position the ablation tool at desired locations within a vessel. In some embodiments, the ablation tool may a rotary cutting element that has an axis of rotation that is approximately parallel to the local axis of a vessel to be cleared. In some embodiments, the ablation tool may have a single side and or a top that allows clearing of material and which is capable of both radial positioning and rotational positioning via the stabilization device or devices and which may also be capable of axial motion via the stabilization device.