1. The Multipurpose Cutting Kit allows for sturdy, controlled cuts in a variety of materials including: wood, ceiling tiles, drywall, laminate, fiberglass, plastic and vinyl siding 2. 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 Kit Colour:Black+silver Material:Plastic + Steel Size:Tool Converter Height: 48mm/1.89 inch Tool Converter Diameter: 60mm/2.36 inch Inner diameter: 18mm/0.71 inch Outer diameter: 25mm/0.98 inch Maximum Depth Adjustment: 3/4 inch(19mm) Max RPM: 28,000 Drill diameter: 1/8 inch(3.175mm) Hss routing router bits length: 39mm /1.53 inch Twist dirll bit length: 60mm/2.37 inch Package Contents: 1 x Cutting Guide 4 x twist Drill 6 x HSS Routing Router Bits Only the above package content, other products are not included. Note: Light shooting 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.