Description: Blue: Great for combined plunge-cutting and pattern/template routing. For increased work piece visibility,use shank bearing flush trim bit in a handheld router allowing the template to be positioned on top of the work piece. In a router table, template will be positioned underneath the work piece, can also be used without the bearing as a standard straight bit. Yellow: Top and Bottom Bearing Router Bit is great for all your large stock trim applicatons, can be used with either a top or bottom template. Especially useful for template work when routing rounded orcurvy wood with sensitive end-grains. Specification: Blue: Two flute carbide cutters with enclosed ball bearing 1/4" shank Material: Alloy Shank Diameter: 6mm (1/4") Bearing Diameter: 12mm (1/2") Total length: Approx. 44mm (1-3/4") Yellow: The top and bottom bearings allow you to flip over the wood stock when you reach"up-grain" and rout that segment in a "down-grain" direction, maintaining uniform smoothness around the work-piece. Total length: Approx.76.2mm Bearing Outer Diameter: Approx. 1/2" Cutting Height: Approx. 1" Shank Diameter : 1/4" Material: Body: Solid Hardened Steel Blade: Grain carbide Package Includes: 1 Piece of Blue Template Router 1 Piece of Yellow Flush Trim Router Bit Note: Please allow 1-3mm due to manual measurement, make sure you do not mind before you bid. The colors may be different for the different display, please understand.