A: Thank you for your question. The EMCO 100 Series Self-Storing Storm Door has come with all the hardware to install to your door. - Jay
A: Yes, the storm door comes with all the hardware to install, you just need the tools
A: I would think it could lock from the inside.
A: This door has an internal lock only
A: Thank you for your question. Thank you for your interest in purchasing an EMCO 100 Series Storm Door. Yes, you can installed it as a replacement for a 2011 model doublewide storm door. Please note, to install a double door, you need to purchase two single doors and an astragal kit. The astragal kit works in conjunction with two storm doors and is available for all standard and custom sizes and colors. The astragal is the center section between the fixed and functioning door. General installation requirements for a double door are the same for a single door. Please go to the nearest Home Depot store in your area and inquire about the door you like. - Arnie