【1PC】 Specifications: Shank diameter: 1/4 Cutting depth: 3/8 Cutting length: 1/4 Maximum diameter: 1-1 / 4 Material: Carbide tip Bearing outer diameter: 1/2 Total length: 2 Cutting depth: 3/8 Included：1 X T-shape cutter 【50PCS】 50pcs/set 1/4in Handle Wood Router Bit Mill Engraving Trimmer Adapter Trim Woodworking Milling Cutter Specifications: Material: hard alloy Product size: As shown in the label (D is the diameter of the router bit; R is the carpenter's molding radius). Product weight: 270g Outer box weight: 2800g Packaging: high-grade aluminum box packaging. Carving knife head width: 3/16 -3/4 Carving knife handle diameter: 1/4 Packaging: individual plastic box packaging Usage: 6.35mm/0.25 center shaft, used in electric and manual engraving machine. The 6.35mm/0.25 handle can be clamped by self-tightening to carve the machine and product. Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow slight measuring deviation due to manual measurement.