This set of 12 drill bits is made by the National Twist Drill Co. in the United States. The bits are made of carbon steel and have a length of 3 1/2". They are suitable for drilling and can be used with a variety of drills. The package includes 12 drill bits, each with a number 12 size. The manufacturer color of the bits is black. These drill bits are listed as new and are a great addition to any power tool collection.

One Dozen No. 12 High Speed Straight Shank Drills

Wire Gauge, List 208 by the National Twist Drill & Tool Company Detroit USA