Usage Tips:Our flush trim router bit made of industrial quality solid carbide, which has high hardness, wear resistance, good strength and toughness. The surface adopts advanced coating technology, which can achieve precise and clean trimming. Our trimming head adopts 20 design, which is and can better removal of wood chips. The double bearings design can smooth cut and 2 bearings can easy wood rolling. The cutter head is designed with compression to prevent edge chipping. The package includes a long and a short flush trim router bit. The short one has 1/2inch , 1-7/9inch cutting length, uses 12 , 3/4inch diameter. And the long one has 1/2inch , 2-5/9inch cutting length, uses 20 , 3/4inch diameter. The product is suitable for MDF, sandalwood, softwood, hardwood, plywood, laminate, MDF, compressed board, particle board and any hardwood finish. It can also be used for edge trimmers, hanging routers, routers, and . Parts List:2x1/2inch Upper and Lower Bearing Spiral Trimming Cutter Product Name: 1/2inch Flush Trim Router Bit Set Size: Short: 1/2inch , 1-7/9inch cutting length, uses 12 , 3/4inch diameter Long: 1/2inch , 2-5/9inch cutting length, uses 20 , 3/4inch diameter Colour:As Shown Material:steel Package Contents: 1 set x flush trim router bit Only the above package content, other products are not included. Note: Light reflection 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.