About Xuanfeng Factory :We are a professional factory with 20 years of production history. Our factory philosophy is to provide our customers with: satisfactory quality of use, high work efficiency, and perfect after-sales service. About that product: Cutting Diameter: 1/8" Cutting Length:1-1/2" Shank Diameter: 1/4" Overall Length: 3" PREMIUM QUALITY: The spiral router bits made of solid carbide , it is high-wearable and has a long life. You can decrease the times of changing cutters, save production time. HIGH EFFICIENCY: These bits own sharp edge which is able for fast engraving that makes high efficiency, durable, high precision and not easy to break. It is smokeless and burr-free while processing. THE ADVANTAGE OF SPIRAL BITS : Spiral bits used for side milling, end milling, finish machining, etc. The spiral flutes have a lot of advantages: better chip evacuation, less heat buildup, and cleaner edges. Wide Application: Plywood Composite MDF Fiberglass Plexiglas Plastic, PVC & Acryllic Aluminum, Brass, Bronze, Copper & Titanium Sign Foam, Sign Board & HDU