Features: High carbon steel flat wood boring drill bits with HRC55 60 hardness ensure precise, effortlessly drilling for woodworking projects, perfect for enlarging holes and creating clean edges. double edge blade design enhances cutting efficiency and accuracy, suitable for benches drills, hand drills, and most power tool for functional applications. Ideal for carpenters, DIY enthusiasts, and professionals seeking reliable, heat treated carbon steel tool for woodcraft, furniture assembly, or renovations tasks. Use these accuracy ground shovel type bits for cabinet hardware installation, door hinge adjustments, or crafting wooden joints with smooth, splinter free result. Engineered with a flat head geometry and polished surfaces, this 6 piece set delivers unmatched durability and control in hardwood, plywood, or density board materials. Specifications: Material: Carbon steel Model: 10-25mm Length:Approx.150mm/5.91inches Package Includes: 6Pcs Woodworking Flat Drill Retractor note: Please allow 1-3cm error due to manual measurement. please sure you not mind before you bid. Due to difference between different monitors, the picture may not reflect the actual color of the item.