Woodstream LG ALUM PET DOOR

No drilling required for screws. Fits hollow and solid doors. Flexible PVC flap with magnetic energy seal. Installation in 3 easy steps. Steel security panel with lock. Accommodates door widths from 1-1/4" to 2-1/4". No. 7120: Small, suited for breeds up to 7 lb. and cats up to 15 lb., 2.25" D. x 8.38" W. x 11.50 H. No. 7121: Medium, suited for breeds up to 40 lb., 2.25" D. x 11.38" W. x 16.25" H. No. 7122: Large, suited for breeds up to 100 lb., 2.25" D. x 13.50" W. x 20.75" H. No. 7123: Extra large, suited for breeds up to 220 lb., 2.25" D. x 17.00" W. x 27.50" H.