The Phas-Lok Adjusting Hub is an economical, yet precise device. It provides an easy way to change the phase relationship of a drive component and the shaft. It is ideal for fine tuning timing adjustments, adjusting for chain elongation, and sprocket tooth wear. The Zero-Max Phas-Lok provides an accurate, mechanical adjustment within a 24 degree range (±12°).
| Dimensions A | 5-1/2 |
| Dimensions B | 1 1/2 |
| Dimensions C | 1 1/2 |
| Primary Materials | Aluminum |
| Trade size | 3/4 in |