About this product: It is made of high quality hard alloy, has higher strength, higher strength, is strong and durable, and is not easy to carry. 1/2 inch bearing diameter, 1/4 inch shank, cutting length: 10mm/20mm/25mm/38mm, widely used in portable handheld and tabletop cutters. The blade backlash-free design is sharp and smooth, suitable for cutting, three-dimensional free-angle and grooving. Heat resistant jaws with PTFE coating to prevent build up of wood chips, resin and asphalt. Good wear resistance, long service life. Top bearing router bit set cuts all compost materials, MDF, solid wood, particle board, plywood, etc. Applicable models: engraving machine, trimmer. Product Material: carbide. Shank Diameter: 1/4. Bearing diameter: 1/2 inch. Cutting length: 10mm, 20mm, 25mm, 38mm. Package contents: 4 x 1/4 inch shank router bit. The blade backlash-free design is sharp and smooth, suitable for cutting, three-dimensional free-angle and grooving. Heat-resistant cooking with PTFE coating to prevent the build-up of wood chips, resin and asphalt. Good wear resistance, long service life. Top bearing router bit set cuts all compost materials, MDF, solid wood, particle board, plywood, etc. Applicable models: engraving machine, trimmer.