{"product_id":"80pcs-carbon-steel-woodruff-half-moon-key-assortment-set-metric","title":"80pcs Carbon Steel Woodruff Half Moon Key Assortment Set","description":"\n\u003ch2\u003e80-Piece Carbon Steel Woodruff Key Assortment Set\u003c\/h2\u003e\n\u003cp\u003eKeep your mechanical assemblies tight and precisely aligned with this comprehensive 80-piece carbon steel Woodruff (half-moon) key assortment. Whether you're working on crankshafts, gear shafts, pulleys, or general mechanical fastening projects, this multi-size set has you covered with the right key for every job.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose This Key Set?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Carbon Steel Construction:\u003c\/strong\u003e Each key is crafted from high-grade carbon steel, delivering reliable strength and long-lasting performance across a wide range of mechanical applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e80-Piece Combination Set:\u003c\/strong\u003e Includes 80 half-round (semi-circular) keys in multiple metric sizes, giving you the versatility to tackle different fastening needs in one convenient kit.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision-Machined Dimensions:\u003c\/strong\u003e Accurately measured to ensure a secure, snug fit in keyways — minimising play and maximising torque transfer between shaft and hub.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrganised Storage Box:\u003c\/strong\u003e All keys are stored in a sturdy PP plastic compartment box, making it easy to identify and access the size you need without rummaging through loose hardware.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Designed for high universality fitment across crankshafts, motor shafts, gear shafts, and other keyed mechanical assemblies in automotive, woodworking, and industrial settings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Semi-Circular \/ Woodruff (Half-Moon) Key Set\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Carbon Steel (keys) + PP Plastic (storage box)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Silver\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 80 pieces\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSizing:\u003c\/strong\u003e Multiple metric sizes included\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal Fitment:\u003c\/strong\u003e Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e80 × Carbon Steel Half-Moon Keys (assorted metric sizes)\u003c\/li\u003e\n  \u003cli\u003e1 × PP Plastic Storage Box with compartments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eYou May Also Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-inch-threaded-brass-ball-valve-water-gas-oil-flow-control\"\u003e1-Inch Threaded Brass Ball Valve – Water, Gas \u0026amp; Oil Flow Control\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-200mm-jewelry-measuring-caliper-bead-stone-gauge-stainless-steel\"\u003e0–200mm Jewelry Caliper – Stainless Steel Bead \u0026amp; Stone Gauge\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-relay-module-dc-3-3v-24v-optocoupler-arduino\"\u003e1-Channel Relay Module DC 3.3V–24V Optocoupler for Arduino\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor general guidance on fastener safety standards and mechanical hardware, visit the \u003ca href=\"https:\/\/www.nist.gov\/topics\/manufacturing\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNIST Manufacturing Standards resource\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Actual colour may vary slightly from product images due to monitor brightness and lighting conditions. Please allow for minor measurement tolerances on stated dimensions.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is a Woodruff (half-moon) key and what is it used for?\u003c\/h4\u003e\n\u003cp\u003eA: A Woodruff key, also called a half-moon or semi-circular key, is a fastening component inserted into a matching keyway on a shaft and hub. It prevents rotational slipping between the shaft and an attached component such as a gear, pulley, or sprocket, ensuring secure torque transfer in mechanical assemblies including crankshafts and motor shafts.\u003c\/p\u003e\n\u003ch4\u003eQ: Are these keys metric or imperial sized?\u003c\/h4\u003e\n\u003cp\u003eA: This assortment features metric-sized half-moon keys, making it well-suited for a wide range of metric-standard machinery, automotive, and general mechanical applications.\u003c\/p\u003e\n\u003ch4\u003eQ: How are the keys stored and organised?\u003c\/h4\u003e\n\u003cp\u003eA: The 80 keys come pre-sorted in a durable PP plastic compartment box, keeping each size separate for quick identification and easy access during projects.\u003c\/p\u003e\n\u003ch4\u003eQ: What material are the keys made from, and how durable are they?\u003c\/h4\u003e\n\u003cp\u003eA: The keys are manufactured from carbon steel, which provides excellent strength and durability for reliable use in both light-duty and demanding mechanical applications over an extended service life.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is a Woodruff (half-moon) key and what is it used for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A Woodruff key, also called a half-moon or semi-circular key, is a fastening component inserted into a matching keyway on a shaft and hub. 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