Abstract: An adaptor for use with flangeless spools of coiled tie material having cylindrical central cores about which the tie material is wound, includes a cylindrical center section, a pair of circular flange sections, each of which is mounted to an end of the center section and at least one of which is removable therefrom, and a spool engaging device which prevents a spool mounted on the center section from rotating independently of the adaptor. The spool engaging device includes a pair of spacer pads and a blade interposed between the pads. The spacer pads and the blade are housed in a slot formed in a portion of the center section. The blade angularly protrudes from the circumferential surface of the center section a distance which is sufficient to at least partially cut into the thickness of the core of the spool thereby preventing rotational movement of the spool relative to the adaptor.