{"product_id":"polyfit-adjustable-kettlebell-30-lb-black-5-position-selector-cast-iron-core","title":"Polyfit Adjustable Kettlebell — 13.6 kg Black | 5-Position Selector, Cast-Iron Core","description":"\u003cp\u003e\u003cstrong\u003eThe Polyfit Adjustable Kettlebell is a single compact kettlebell that switches between five calibrated weight settings, replacing multiple kettlebells for efficient home strength and conditioning.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for athletes and home exercisers who need variety without clutter, the Polyfit Adjustable Kettlebell combines a cast-iron core with a matte non-slip finish and a quick-change mechanism. Available in three model ranges (30, 40, 50 lb maximum), each unit lets you step up weight in small increments so you can progress workouts, save space, and switch exercises in seconds.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I change weights quickly between exercises?\u003c\/h3\u003e\n\u003cp\u003ePolyfit’s selector system is engineered for tool-free, one-handed adjustments so you can move from swings to presses with minimal downtime. The mechanism locks solidly into place to feel like a single-piece kettlebell at each setting.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e5 calibrated weight positions across each model for incremental load increases.\u003c\/li\u003e\n  \u003cli\u003eTool-free selector dial that clicks into place for secure use.\u003c\/li\u003e\n  \u003cli\u003eFast transitions: change weight in seconds to maintain workout flow.\u003c\/li\u003e\n  \u003cli\u003eClear weight markings on the selector for accurate selection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat safety and grip features protect my hands during intense sets?\u003c\/h3\u003e\n\u003cp\u003eThe handle is finished with a matte, non-slip coating that minimizes slippage from sweat and provides a comfortable grip for dynamic movements. The handle diameter and smoothness are balanced to reduce friction while maintaining control.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMatte non-slip coating that wicks moisture and improves hold.\u003c\/li\u003e\n  \u003cli\u003eSmooth but textured handle profile for consistent hand placement.\u003c\/li\u003e\n  \u003cli\u003eSecure locking mechanism so the weight does not shift mid-rep.\u003c\/li\u003e\n  \u003cli\u003eDurable coating resists chipping and reduces noise on contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable is the Polyfit Adjustable Kettlebell for long-term use?\u003c\/h3\u003e\n\u003cp\u003eUnder its matte finish sits a cast-iron construction known for longevity and resistance to wear. The design balances protective coating with a solid internal structure so the unit withstands repeated drops and high-frequency home use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCast-iron core for structural integrity and long service life.\u003c\/li\u003e\n  \u003cli\u003eProtective matte coating to prevent surface damage and rust.\u003c\/li\u003e\n  \u003cli\u003eRobust selector components built to handle frequent adjustments.\u003c\/li\u003e\n  \u003cli\u003eCompact footprint reduces the chance of damage from storage or transport.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich model should I choose for my strength level and goals?\u003c\/h3\u003e\n\u003cp\u003eSelect the model based on the heaviest load you need: 30 lb max for beginners and light conditioning, 40 lb for intermediate strength work, and 50 lb for advanced lifts and heavier conditioning. Each model still offers the same five-step adjustability for progressive training.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e30 lb model: 10–30 lb range for newcomers and rehab-focused routines.\u003c\/li\u003e\n  \u003cli\u003e40 lb model: 10–40 lb range for steady strength progression.\u003c\/li\u003e\n  \u003cli\u003e50 lb model: 10–50 lb range for advanced kettlebell exercises.\u003c\/li\u003e\n  \u003cli\u003eAll models: space-saving single unit replacing multiple fixed kettlebells.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Polyfit Adjustable Kettlebell is built for home gym owners, personal trainers, and active exercisers who want a compact, flexible tool to cover a wide spectrum of strength, conditioning, and circuit-style workouts. It suits users who need quick weight changes, limited storage space, and a durable kettlebell that scales with their progress.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can one Polyfit kettlebell replace multiple fixed kettlebells?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — each Polyfit model adjusts through five calibrated weight settings, replacing several fixed kettlebells and saving space.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the weight selector safe during dynamic exercises?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The selector locks into place and is designed to stay secure during swings, presses, and typical kettlebell movements.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Polyfit","offers":[{"title":"Default Title","offer_id":59378645303644,"sku":"B0C24YJKD7","price":310.58,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1059\/5604\/9244\/files\/polyfit-front-view-black-kettlebell.jpg?v=1791237256","url":"https:\/\/sportium.co.uk\/products\/polyfit-adjustable-kettlebell-30-lb-black-5-position-selector-cast-iron-core","provider":"Sportium Sports And Outdoors","version":"1.0","type":"link"}