ITEM NAME:4pcs/set 1/4inch Handle Engraving Trimmer Wood Router Bits Milling Cutter A#S Product Description Description: 4pcs/set 1/4inch Handle Engraving Trimmer Wood Router Bits Mill Trim Milling Cutter Woodworking Tool Specifications: Material: hard alloy Product size: 71*6.5*6.5mm/2.8*0.26*0.26" Weight: about 100g Blade width: 1/4"-1/2" Diameter of handle of carving knife: 1/4 "; Packaging: individual plastic box packaging Usage: 6.35mm/0.25", 12.7mm/0.5" 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. Included: 4 x Router Bits.Usage: 6.35mm/0.25", 12.7mm/0.5" 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. Blade width: 1/4"-1/2".