Hook may be used on rail with a diameter of no more than 2.9cm Material: PP, iron The hook may be 360° rotated and freely adjusted to keep the clothes face the sunshine in order to avoid the hung clothes' being shaded at the up or bottom part. Closed windproof hook keeps the clothes from falling when hanging in the high-rise. The hooks at different positions are suitable for placing at the hanger or clothesline of different sizes. The hook has an arc face and is comfortable to use, convenient and energy saving. The clamp with sawtooth pattern has round spring and may used to easily and powerfully hang clothes without leaving trace. It may be folded and stored, saving space.