Robertson square drive hex insert bits (3 point size) have four sides that are at right-angles to each other and opposite sides are parallel
| Type | Power Bit |
| Style | Square |
| Material | Alloy Steel |
| Drive Size | 1/4" |
| Length | 1-15/16" |
| ACR | No |
| Heat Treated | Yes |
| Nominal Size | 9/64" |
