Dremel Universal Dual-Interface blades require no adapter. The unique interface fits any oscillating tool except those with Starlock interface. This 5pc variety set includes (1) 3 In. U2 HCS Wood/Drywall saw blade, (2) 1-1/4 In. U2 HCS Wood Blade, (2) 1-1/4U2 BiM Wood/Metal Blade. These blades work well on a variety of materials such as drywall, wood and metal. Cut openings in flooring for venting, in walls for electrical boxes; repair damaged flooring, cut holes for doorjambs, cut track strips and base boards for flooring installation. This kit includes a storage case to quickly and easily store the blades.