Constructed from high strength chrome steel with corrosion-resistant and fingerprint-proof matte chrome finish for durability 12 point, 72 teeth ratchet gear needs a minimum of 5-degree swing that is perfect for any professional tool set or home improvement jobs 6 double-head wrenches covering sizes 8mm x 10mm, 9mm x 11mm, 12mm x 14mm, 13mm x 15mm, 16mm x 18mm, 17mm x 19mm Perfect for hard to reach workspaces, set covering 24.4cm, 28cm, 33.4cm, 37.5cm, 40.5cm, 41.5cm Box end heads 180 degrees to get around obstructions quickly Snug-fit hex-shaped fastener heads resist slipping off while you work, Manufacturer: Yhplxyuus