The High Security Chain assembly plates are mounted "under" the BOLT BUDDY plates on the inside, this makes it the strongest security chain on the market.  There are no screws to pop out when the door is forced and the chain is of sturdy gauge steel.  Excellent security against home invasions.  This assembly is also available in many different colors.

Picture 1 shows the High Security Chain in place as a Home Invasion deterrent (excellent for small children that like to answer the door).

Picture 2 shows the Bonus Bolt in position either to reinforce double doors or as a night bolt.

All Bolt Buddy products are patented.