This is a stainless steel roller assembly with an M-shaped tension spring with a 1 in. stainless steel roller is used by several patio door manufacturers. The heat treated stainless steel tension spring is 2-3/4 in. long and shaped like an M giving it the tension needed by the screen door to slide properly.
Used by several patio screen door manufacturers
2-3/4 in. M-shaped tension spring
1 in. diameter concave roller
Heat treated stainless steel spring and ball bearing roller
2-pack
Height adjustments are made from edge of door
A Phillips head screwdriver is required for Installation
For further dimensional information, please see the line drawing