Features: Diversified functions, lengthened drill body: unlimited use, diverse styles and specifications. Sp-iral chip removal, universal drill shank: anti-rust treatment on the surface of the drill body, drilling chips more efficient. Durable, precise positioning: alloy material, very sturdy and durable, and more precise drilling. for electric drill models: electric drill, percussion drill, for bench drill, etc. Note: Do not make holes in metal objects. Specifications: Material:Alloy Color : Blue Size1: Approx.16mm/0.62inch Size2: Approx.22mm/0.86inch Size3: Approx.25mm/0.98inch Size4: Approx.18mm/0.70inch Size5: Approx.20mm/0.78inch Size6: Approx.19mm/0.74inch Note: 1.Please allow 1-2mm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 10x Hexagonal Drill