Unique mushroom-shaped heads snap shut and stay locked.
| Stem Density Combinations(per sq/in) | Notes | |
| Strongest | 250:400 | For more strength change one side to Type 400 |
| Stronger | 250:250 or 170:400 | Start with 250:250 and test in your application |
|
Strong |
170:250 | If you don’t need that much strength, change one side to Type 170 |
| Not Recommended | 170:170 or 400:400 |
*We advise against mating 400:400 because the density makes it difficult to engage and disengage effectively. For 170:170 the head pattern may not match up well to engage the heads properly. |








