1、MAIN USE: Cutting, 3D sag angle, slotting. The non backlash design of the architectural router bit is incisive and smoothly, suitable for trimming, 3D free angle, and slitting. 2、FINE WORKMANSHIP: Nano blue coating with heat resistance enables the cutting edge of the router bit to maintain crucial sharpness and lubricity. 3、EXCELLENT CUTTING: This router bit works with incisive cutting, smoothly rotation, fast operation, and strong hardness. 4、WIDE APPLICATION: This router bit is suitable for wood, MDF, particle board, plywood and other compact panels. 5、5 SET: There are 5 set router bits in the package of different size that you can use them respectively to meet your different needs. 5 x Architectural Router Bit 5 x Plastic Box  Item Type: Architectural Router Bit Material: Tungsten Steel AlloyProduct Specification: 1/4 x R 1.5 (without bearings); 1/4 x R2 (without bearings); 1/4 x R 2.5 (without bearings); 1/4 x R3 (without bearings); 1/4 x R4 (without bearings)