Industrial-Grade Heavy-Duty Thickened Woodworking Clamp F Clamp New Metal 6inch Woodworking Quick F Clamp

“The frame completely surrounds the lenses, with good stability, can better fix the lenses, suitable for people of various face shapes and degrees, with a variety of styles and different materials and colors.”

“The frame only surrounds the upper part or most of the lens, and the lower part is held in place with nylon wire or wire, which is lighter in weight and has a more stylish appearance, giving it a sophisticated feel.”

“There is no frame, and the lenses are directly connected to the temples through screws or other means, and the overall feeling is simple, lightweight, and stylish, which is suitable for people who pursue a minimalist style, but the stability is relatively poor and it is easy to damage.”

“Polycarbonate lenses, with ultra-lightweight, super impact resistance, good UV protection, suitable for sports glasses or children's glasses, etc., but the refractive index is relatively low, the lens is thicker, and the price is higher. ”