1.Size type: Y shape 3 way bike hexagonal key; hexagonal size: 2.5/3/4 mm 3/4/5 mm 3/4/5 mm (extension rod) 4/5/6 mm; rod length: 23 mm/0.91 inches; 44 mm/1.73 inch extension rod); adjacent side length: 123 mm/4.84 inches; 123 mm. 7mm / 5'; 160 mm / 6.3 inches; colour: blue silver tone; weight: 160 g. 2.Material The Yshaped threeway wrench is mainly made of chrome vanadium steel, which has high strength and hardness and is resistant to oxidation, corrosion and shock. No breakage, damage or deformation and can be used for a long time. The handle is made of lightweight PP, which is nonslip and wearresistant and protects the key bar ly. 3.Feature This triple socket wrench is a unique design with Yshape. The handle is comfortable to hold and excellent ergonomics and technical approaches that make it easier to control the wrench with less effort; compact construction in three different sizes, light practical, and very convenient to carry. 4.Application The handy hex key is ideal for riding in nature and is an indispensable tool for bicycle repair and maintenance. In addition, the set can also meet your everyday needs for indoor furniture, home maintenance, electrical appliances, mechanical tools, etc.