The Round Aluminum Backer gives you the best of both worlds, less weight and maximum strength. The Round Aluminum Backer comes in two sizes a standard 1.375′′ and a bullseye 1.60′′. Both are made with .150′′ thick aircraft-grade material.
.150″ thick aircraft-grade material is the strongest in the industry
Large 1.375″ round heat-treated aluminum
Big 1.600″ Bullseye backer for 2.86″ pitch and larger
Keeps stud rigid – firmly supported
Durable (used for all traction applications)
Use when less weight and maximum strength are a concern
2 Styles to fit 5/16″ stud holes and Big Shot studs