Universal dual interface directly fits all oscillating tools without the use of an adapter， excluding starlock. For applications such as openings in flooring for venting， electrical boxes， repairing damaged flooring， doorjambs， cutting pipes and 2x4 lumber in one pass， cutting hard and abrasive materials like nails， screws， stainless steel bolts. MM485U High performance carbide teeth provide up to 30X life in hardened material vs standard bi-metal oscillating blades. MM482U Dremel bi-metal blades in wood with nails provide up to 15X life vs standard.