The CRL Center-Hung Diamond Style Spindle Engagement End-Load Arm Assembly for 5/8" Depth Top Door Rail is designed as an original replacement arm for existing pre-1998 original Kawneer® Husky® Style Door Closers. This replacement arm can be used with the CRL Retrofit Diamond Spindle Overhead Concealed Closer and original design Kawneer® Husky®Type Closers without requiring alteration to the original door prep. The arm is used for Center-Hung applications when the door top rail is 5/8" (16 mm) deep. Centering adjustment is accomplished by two bolts in the swin end of the arm. Lateral adjustment can not be made with this arm.