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Pieces
The Middle Atlantic HSK Square Drive Security Screws belong to the highest security screws of Guardian series. These screws are 3/4" long with 10-32 threads. For your convenience, each screw has a self-guiding pilot point to simplify installation. These screws come with installed nylon washers.
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The only reason I'm dinging this down to 4 stars is because either I didn't notice it or the description wasn't clear. DO NOT forget to order the bit. This bit is patented by Middle Atlantic so my nifty security bit case with everything under the sun did not include what I needed. Had to wait to start installing equipment until I received the bit. Otherwise, these things are great!