Includes both Metric & Inch sizes. Precision made handle with finger control cap. Sixteen interchangeable hardened bits. 4" (102mm) extension. Plastic storage case. Metric Bits: .7, .9, 1.3, 1.5, 2.0, 2.5, 3.0, 4.0mmInch Bits: .050, 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32