About this item

Twist-to-tighten/loosen with heavily-knurled grip means no wrench or key needed. Heat treated & tempered highcarbon steel for durability; erode-resistant black oxide finish. Corded Rotary Tools without changing collets. The drill adapter compatible for all Dremel cordless and corded rotary tools, such as drill bits, polishing wheels, sanding drums Quick change keyless chucks made of alloy material, well-made, durable and sturdy, built-in spring, safer than plastic models These tiny bits shank rotary tool accessories are better alignment with the rotation of the tool, more securely and stability under high-speed rotation Easy and quick to change accessories replacement on multi tool without changing collets. This keyless chuck only suitable for rotary tool models 275, 285, 398 and models 750, 770 and 781. NOT fit for other rotary tools. Pay attention to measure the contrast size before buying. Easy and quick to change accessories replacement on multi tool without changing collets Please note: Only suitable for rotary tool models 275, 285, 398; Also suitable for