內接規格為 1/2"、外接規格為 3/8",可將 1/2" 傳動工具(如棘輪扳手、扭力扳手)轉換使用 3/8" 傳動套筒,擴大工具相容性、節省重複購置不同傳動規格套筒的成本。本體全長 1-13/16"

| Dimension D, Overall Length, inches | 1-13/16 |
| Dimension B, External Sq. Dr., inches | 3/8 |
| Country of Origin | USA |
| ASME®/ANSI® | B107.10 |
| Dimension A, Internal Sq. Dr., inches | 1/2 |
| Dimension C, Outside Dia., inches | 31/32 |
| Finish | Industrial |
| Replacement Square Drive | GSAF1F2 |