Dremel 655 Router bits Keyhole router bit.   Features: For routing, mounting slots in picture frames or anything that needs to be hung. It is also used alone with any other tools for routing & cutting .  Suitable for DIY projects & can be fitted any router machines with suitable collet / chuck.   Technical specification Shank diameter: 3.2 mm Maximum speed : 35000 RPM color code: Orange Type: Router Bit   User Tips For best results, insert the accessory bit all the way into the tool and then back it out slightly before tightening down. This provides plenty of shank for the collet or chuck to hold onto the bit. Secure objects to a stable surface while working. If chattering occurs, increase speed.   FITS TOOL MODEL: 4000, 400, 398, 395, 300, 285, 275, 200, 100, 8200   Required attachments: 231 router table or 335 plung router attachment