A multimodal abrading device for preparing a sacroiliac joint (“SI Joint”) to receive a graft implant. The abrading device comprises an abrading head having abrading surfaces on a first pair of opposing sides, the abrading surfaces configured for decorticating the cortical bone of the SI Joint. The abrading head further comprises an open tip having a cutting edge configured to cut bone tissue in the SI Joint. The abrading device further comprises a slide hammer assembly at a proximal end of the abrading device, the slide hammer assembly having a released position that enables operation of the slide hammer assembly, and a locked position that prohibits operation of the slide hammer assembly.