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 into a small. the base threads onto the for a tight and secure base for routering. Type: Cutting Guide Attachment Kit Colour:Black+silver Material:Plastic + Steel Size: Converter Height: 48mm/189 inch Converter Diameter: 60mm/236 inch Inner diameter: 18mm/071 inch Outer diameter: 25mm/098 inch Maximum Depth Adjustment: 3/4 inch(19mm) Max RPM: 28,000 Drill diameter: 1/8 inch(3175mm) Hss routing router bits length: 39mm /153 inch Twist dirll bit length: 60mm/237 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 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.