Easily construct your own roller bed or outfeed table using these WoodRiver Roller Ball Inserts. Simply drill ” holes 4″ on center and press into any plywood or MDF surface. Add smooth, controlled movement to your shop.

Features:

• Installs on 4″ centers
• Fits in a ” bored hole
• Polyethylene roller ball and outer body
• Roller ball rides on (7) steel ball bearings

Whats Included:

• (10) ” Roller Ball Inserts