The keyed deadbolt for storm and screen doors complements the appearance of the DX Series pull and push-button handles while adding additional security to your home. A keyed deadbolt allows you keep your main door open and enjoy the light that comes in through a storm door while still feeling secure. It is a high security lock, but a secondary level of security. The key allows you to lock your storm door as you leave the home and unlock it if someone inside has locked the door. Only three small 5/16" holes are required to be drilled through the door for the screws and spindle. Only a tape measure, drill and screw driver are required. A center punch to mark the holes is handy, but not required. If you have a lever-style handle set, you may want to consider our GL Series deadbolt. The set is manufactured from die cast zinc and painted or coated to match the colour of the handles.