ITEM NAME:8mm Shank x 1-3/8'' Lock Miter Router Bit 45 Degree Woodworking Cutter Tool, Description: It is a reversible rail and stile bit that would be a great tool when making cabinet or closet. Made of cemented car.It is a reversible rail and stile bit that would be a great tool when making cabinet or closet. Size: 8mm 1-3/8. Cutting edge would improve working efficiency and product quality. It can be used for finishing a wide range of materials including solid wood, chipboard, plywood, etc.