1. The Multipurpose Cutting Kit allows for sturdy, controlled cuts in a of materials including: wood, ceiling tiles, drywall, laminate, fiberglass, plastic and vinyl siding2. Used for fixing drill bit, milling cutter, and others, keep the more steady.3. Depth adjustment quickly sets correct cutting depth up to 3/4inch (19mm)4. Perfect to make a rotary tool into a small. the base threads onto the tool for a tight and secure base for routering.Type: Cutting Guide Attachment KitColour:Black+silverMaterial:Plastic + SteelSize:Tool Converter Height: 48mm/1.89 inchTool Converter Diameter: 60mm/2.36 inchInner diameter: 18mm/0.71 inchOuter diameter: 25mm/0.98 inchMaximum Depth Adjustment: 3/4 inch(19mm)Max RPM: 28,000Drill diameter: 1/8 inch(3.175mm)Hss routing router bits length: 39mm /1.53 inchTwist dirll bit length: 60mm/2.37 inchPackage Contents:1 x Cutting Guide4 x twist Drill6 x HSS Routing Router BitsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.