The flexible, 36" shaft attaches easily, new 5" bend radius provides more flexibility during use. Specs: comfort grip hand piece, integrated shaft lock button, Quick connect, accepts up to 1/8" shank accessories, works with collet system and the dremel chuck. Fits tool models 400, 398, 395, 300, 285, 275 and 800. Includes: flex shaft attachment, square drive nut and instructions