good hold fasts
It is important  for use, if its not  holding or slipping, it requires you to drill on the bottom side bigger holes. I have used 3/4 inch forsner bit to make the holes and it didn't hold well. I tried 2 things one,<br />I used a file to make hex patterns on the front & back to see if it would cling to wood top better. It helped slightly but it wasn't as effective as the 2nd item which is to drill a larger hole on the underside to allow the hold-fast to move into an angle to actually make a wedging action. other wise it wouldn't work very well. Great product.
Rating: 5 stars