Fastening band and fastening tool therefor

A fastening band adapted to be formed into a loop-like shape around a cylindrical member with a first end portion of the band overlapping a second end portion of the band to the outside of the second end portion, characterized in that:

• said first end portion has, in succession from a tip end thereof, a rectangular hole and an elongate slot extending longitudinally in a lengthwise direction of the band, with an inwardly directed first projection being formed at an end edge of said slot nearer to said tip end and with an end edge of said rectangular hole nearer to said tip end constituting a first tool-engaging portion,
• said second end portion has, in succession from a tip end thereof, an outward protuberance with an end edge constituting a second tool-engaging portion, an outwardly directed second projection for tentative fastening, and an outwardly directed third projection for final fastening, and
• said rectangular hole, said slot, said protuberance, and said first, second and third projections are configured and disposed such that said first and second end portions may be partially overlapped into a tentatively fastened state in which said protuberance and said second projection are received by said slot with said second projection engaging said first projection, and such that with said fastening band in said tentatively fastened state, said first and second tool-engaging portions may be engaged by a fastening tool, and said first tool-engaging portion thereby subjected to a tangential fastening force tending to move said first tool-engaging portion relatively away from said second tool-engaging portion to cause said first projection to ride over said third projection thereby to bring the fastening band into a finally fastened state in which said protuberance and said second and third projections ar received by said slot with said first projection engaging said third projection.