Woodys Double Digger Aluminum Support Plates - Natural - 5/16in. Thread ADD2-3775 Dual stud mounting with more rigidity and less weight than two aluminum plates or comparable steel plates For use with 5/16in. Traction Master push-through studs Increased dome area maximizes advantage of patented Traction Master dished head stud design ISR approved Hole location consistent with Bender Stud Mate plates