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Prime-Line MP9409 Lock and Door Reinforcer, 1-3/4 in. x 2-3/8 in., Solid Brass, Polished Finish (Single Pack)

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$20.09

$ 8 .99 $8.99

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About this item

  • ADDED SECURITY – Prevent forced entry by reinforcing the weak spot of an entry door with the non-recessed door lock reinforcer; use to reinforce and repair both metal and wood doors
  • BUILT TO LAST – Made of solid brass construction, the door lock reinforcement plate comes finished in stainless steel
  • EASY INSTALLATION – All the necessary mounting hardware is included with the lock reinforcement plate for a quick and easy installation; the door reinforcer plate is pre-punched for mounting
  • DIMENSIONS – The door lock reinforcement plate is designed for 1-3/4 inch thick doors; it measures 3-7/8 inch wide by 9 inch tall; it accommodates key-in knob locksets on doors that have 2-1/8 inch bore sizes, with a backset of 2-3/8 inch
  • NOTE - Please refer to the line art drawing for dimensions and compare with your needs before ordering


The Defender Security MP9409 Brass Lock and Door Reinforcer assists in preventing forced entry by reinforcing the weak spot of an entry door. It can be used to reinforce and repair both metal and wood doors. Made of solid brass construction, the lock reinforcer plate comes in a polished brass finish. All the necessary mounting hardware is included for a quick and easy installation. The lock reinforcement plate is pre-punched for mounting. The reinforcer is designed for 1-3/4 inch thick doors that have mortise or drive-in latches. Measuring 3-7/8 inch wide by 9 inch tall, the reinforcement plate accommodates key-in knob locksets on doors that have 2-1/8 inch bore sizes, 3-5/8 inch on center from each other with a backset of 2-3/8 inch. The door reinforcer is non-recessed.