Micro 100's TH / THM / THMA tool holders, which are heat treated and black oxide coated to promote strength and longevity, enable tool engagement and holder orientation flexibility by 4 alignment flats on the shank.
| Finish/Coating | Uncoated |
| Shank Diameter (Inch) | 1.0000" (1) |
| Overall Length (Inch) | 2.75" (2-3/4) |
| Tool Holder Bore Diameter (Inch) | 0.3125" (5/16) |
| Tool Holder Collar Diameter (Inch) | 1.250" (1-1/4) |