25 pc 1-1/2" Fiberglass Reinforced Cut-Off Wheel Disc + 2 mandre 1/8" for Dremel 25pc 1-1/4" Fiberglass Reinforced Cutoff Wheels Each disc is fiberglass reinforced for strength and longer life than normal cutoff discs. Arbor: 1/8 inch For use with Dremel Rotary Tools. 2pc Mandrels