This product is made of quality 316 stainless steel, this product is anti-rust, wear-resistant and durable for long term use under the sea. The head can rotate at all direction smoothly and flexibly. It is pragmatically designed for you. With this product, rope can tidily winding around it without tangling. And it can pass through rope of 5 mm. Features Adopting quality 316 stainless steel, this product is anti-rust, wear-resistant and durable for long term use under the sea. Lightweight and small size design, this product is easy to carry. More Convenient. The head can rotate at all direction smoothly and flexibly. It is pragmatically designed for you. With this product, rope can tidily winding around it without tangling. And it can pass through rope of 5 mm. Suitable for diving. Great diving accessory for you. Specification: Item: Anti-winding Diving Accessory Material: Stainless Steel Colour: Silver Size: Approx. 2.7 * 0.7 cm / 1.1 * 0.3 inch Weight: Approx. 33 g / 1.2 oz Package Included: 6 * Anti-winding Diving Accessory Package List 1Adopting quality 316 stainless steel, this product is anti-rust, wear-resistant and durable for long term use under the sea. 2Lightweight and small size design, this product is easy to carry. More Convenient. 3The head can rotate at all direction smoothly and flexibly. It is pragmatically designed for you. 4With this product, rope can tidily winding around it without tangling. And it can pass through rope of 5 mm. 5Suitable for diving. Great diving accessory for you.