{"product_id":"common-master-keying-book-locksmith-trainers","title":"Common Master Keying Book by The National Locksmith","description":"\u003cp\u003eThis 184-page spiral-bound workbook teaches you to create master key systems from scratch. Instead of dense theory, you get practical worksheets, bitting charts you can photocopy, and real-world examples that show you exactly how commercial systems are built.\u003c\/p\u003e\u003cp\u003eWork through exercises for 5, 6, and 7-pin cylinders. Learn to avoid the common mistakes that compromise security or create key conflicts. The \"scan and print\" section gives you blank forms for your own projects. Written by a locksmith with 40+ years of experience, not an academic.\u003c\/p\u003e","brand":"Locksmith Trainers","offers":[{"title":"Default Title","offer_id":45331319292090,"sku":"LTR-MASTERKEY","price":53.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0688\/7020\/9722\/files\/MASTERKEY_1000x_a9fc5310-bf60-4a84-9b0c-09c63510d75b.jpg?v=1763247098","url":"https:\/\/www.lockpicks.com\/products\/common-master-keying-book-locksmith-trainers","provider":"Lockpicks.com","version":"1.0","type":"link"}