THE DREMEL EZ LOCK MAKES ACCESSORY CHANGES EASY AS PULL - TWIST - RELEASE. THE ONE-PIECE MANDREL DESIGN SIMPLIFIES THE PROCESS OF CHANGING CUTTING WHEELS AND MAKES IT EASY TO THROUGH METAL. FOR USE WITH THE EZ402 EZ LOCK MANDREL. FEATURES UL STYLE""MARGIN-TOP0PX;PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" FIRST PATENTED SYSTEM OF ITS KIND -OFF WHEELS LAST 2 TIMES LONGER THAN CURRENT FIBERGLASS-REINFORCED -OFF WHEELS COMPATIBLE WITH ALL DREMEL ROTARY TOOLS THE EZ-LOCK SYSTEM ELIMINATES THE NEED FOR A SCREW AND A SCREWDRIVER