{"product_id":"common-master-keying-book-locksmith-trainers","title":"Common Master Keying Book | The National Locksmith","description":"\u003cp\u003eProfessional-grade reference covering master key system design, implementation, and servicing. Details key bitting calculations, cross-keying methods, and master key system architectures for commercial and institutional applications.\u003c\/p\u003e\u003cp\u003eIncludes practical examples for 5-pin, 6-pin, and 7-pin systems with step-by-step procedures for creating master key schedules and avoiding common vulnerabilities. Essential for commercial locksmiths. 184 pages, spiral bound.\u003c\/p\u003e","brand":"Locksmith Trainers","offers":[{"title":"Default Title","offer_id":42842160693337,"sku":"LTR-MASTERKEY","price":53.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/9519\/files\/training-material-common-master-keying-book-the-national-locksmith-1205178764.jpg?v=1763251464","url":"https:\/\/clksupplies.com\/products\/common-master-keying-book-locksmith-trainers","provider":"CLK Supplies","version":"1.0","type":"link"}