ITEM NAME:Set of 4 Brad Point Boring Bits Tenon Cutter Woodworking Cutter Tools for Solid Description: Hardened and tempered, carbon steel construction Use on automatic and manual muti-spindle boring machines High hardness, accurate positioning, high precision,smooth cutting,impact resistance Drills all composition materials, solid surface materials, plywoods, hardwoods, and softwoods Suitable for all types of wood processing, furniture cabinet installation, plastic drilling and processing Specification: Material: Carbon Steel Color: as picture shown Total Length: Approx. 70mm / 2.76inch Cutter Diameter: 11mm, 12mm, 13mm, 14mm Package Includes: 4 Pieces of Router Drill Bits Note: Please allow 1-2mm error due to manual measurement, make sure that you do not mind before you.Use on automatic and manual muti-spindle boring machines. Hardened and tempered, carbon steel construction. Suitable for all types of wood processing, furniture cabinet installation, plastic drilling and processing.