1、4 PCS SET: This set comes with four flush trim router bits of 1/4in shank, providing versatility and flexibility for a range of trimming works. 2、TUNGSTEN STEEL ALLOY SHELL: The tungsten steel alloy shell of these flush trim bits is built to last, featuring carbide tip particles for improved strength and wear resistance. 3、BLUE COATING: The blue coating on these router bits enhances their hardness and heat resistance, ensuring the cutting edge stays sharpness and lubricated for efficient cutting and reduced friction. 4、CLEAN CUTTING: These flush trim bits are designed with smoothly edges for a clean, precise cut, leaving a smoothly finish on your workpiece. 5、VERSATILE APPLICATIONS: Suitable for use on a variety of materials including wood, MDF, chipboard, plywood and other compact panels, these flush trim bits are ideal for a range of trimming works.