DBM IMPORTS Heavy Duty 5C Collets Angle End Mill for Grinding Fixture Sharpener Milling 1/16" ~ 11/8" 50. 88. FREE Shipping. Best Seller in Spiral Router Bits. Whiteside Router Bits RU2100 Standard Spiral Bit with Up Cut Solid Carbide 1/4Inch Cutting Diameter and 1Inch Cutting Length.