The rotating lid on the REVOLUTION model pivots away from the hole opening. This eliminates the need for manually raising or lowering the lid for routine access and maintenance. Cover rotates on a stainless steel pin that keeps cover attached to frame. Assembly was designed for use in elevated manhole applications such as outfalls and non-traffic applications, where the access cover can be as much as 4 ft. above the ground. East Jordan Iron Works Inc., East Jordan, Mich.