Product description: NAGU 10507 1" Diameter x 5" Long Tool Rest Post is part of the NAGU Modular tool rest system, it is a flexible system which allows you to mix and match your tool rest Posts and supports to create the perfect tool rest for your needs. Requires one of NAGU tool rest bar (additional purchase). this threaded tool post enables you to use different NAGU tools rest bar as needed. What's in the Box: * 1 NAGU 10507 1" Diameter x 5" Long Tool Rest Post for Modular Tool Rest System * 1 Conical Spring Washer Notes: To create the perfect tool rest you need, one of NAGU tool rest bars need to be purchased additionally to work with this tool rest post. * Tool post bars available for additional purchase: - NAGU 10501 4"(101mm) Tool Rest Bar with Hardened Steel Rod for Modular Tool Rest System with M10 x 1.5 thread. - NAGU 10502 12"(304mm) Tool Rest Bar with Hardened Steel Rod for Modular Tool Rest System with M10 x 1.5 thread. - NAGU 10503 6"(150mm) Tool Rest Bar with Hardened Steel Rod for Modular Tool Rest System with M10 x 1.5 thread. - NAGU 10504 5-3/16" (132mm) Diameter Curve Bowl Rest for Modular Tool Rest System with M10 x 1.5 thread. - NAGU 10505 8-1/2" (216mm) Diameter Curve Bowl Rest for Modular Tool Rest System with M10 x 1.5 thread. - NAGU 10506 Both 8-1/2" (218mm) & 5-3/16" (132mm) Diameter Curve "S" Bowl Rest Bar for Modular Tool Rest System with M10 x 1.5 thread.