Large cam lift hinge with heavy strap of 1/4" steel is designed for installation where irregular floors interfere with operation of doors. Ductile iron cam rotates on a hardened roller bearing to lift the door, eliminating sag. Hinge is reversible for left or right hand doors. Maximum lift is 1/2". Holes in strap are drilled and countersunk for 3/8" bolts. Cam and bracket are ductile iron, strap is steel. Available 1-1/8", 1-1/4" and 1-5/8" offset. Specify offset required.