The EG/01 Edge Guide fits on the Grex models P650, P650L, P645, P645L, P635 & H850LX, Fasco F23CA64-50PB & F23A64-35PB,Max NF235A/23-35 and the Senco FinishPro 23LXP, FinishPro 23SXP and FinishPro21LXP