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Perfect Fit for Common Sizes: Works with 10 mm and 13 mm drill chucks — the two most widely used sizes — so you can confirm compatibility at a glance Wide Brand Compatibility: Fits drills from a broad range of leading manufacturers, making this a versatile chuck key for most home workshops and trade kits Built to Last: Crafted from high-quality steel, this drill chuck spanner resists wear and deformation, outlasting flimsy alternatives that bend or break on first use Meets DIN 6349 Standard: Certified to DIN 6349 for precision and safety, giving you confidence that this chuck key will engage your drill chuck correctly every time Comfortable and Easy to Use: The ergonomic handle allows effortless tightening and loosening of drill chucks, reducing hand fatigue during repeated use