Specification Brand : HUHAO BulletPoint1 : Material: HSS; 2.9mm cut diameter; 31mm cut length; 60mm total length BulletPoint2 : Metal drill bits for steel, Cobalt drill bits, HSS, Small micro quick change, Wood drill bits, Round shank BulletPoint3 : Each drill bit has a heavy-duty spiral flute design that produces fast chip ejection,Shorter cutting lips reduce torque for drilling in high-tensile-strength materials BulletPoint4 : Particularly successful in cutting through hard metals such as stainless steel copper aluminum cast iron, although they can be used for softer materials, too. Color : Brown ExternallyAssignedProductIdentifier : 8011735404119 ItemName : HUHAO 10PCS Small Metal Drill Bit for Steel 2.9mm Shank and Cut Diameter HSS Micro Twist Drill Bits for Aluminum Iron Wood ItemTypeKeyword : wood-drill-bit-sets Manufacturer : HUHAO Material : HSS ProductDescription : Specification: Shank diameter: 2-2.9mm Brand Name: HUHAO Material: Alloy Safety instructions: 1. The bladed product is not use for people under 18 years. 2. The item is only use for industrial cutting not hazardous article.