The Optical Square Clip is made from thin ebony wood pieces combined with Aluminium to improve the strength of the frame. This alloy is sturdier & more durable than pure wood. It’s unique design-hinge makes it more flexible than a product purely made from one material, making it suitable for all face shapes. There are two ways to use this product: with/without a sunglasses piece. The Optical Square Clip comes with a clip to add the sunglasses piece onto the product so that it can be used in any ocassion. It is essentially simple & easy to use. All lens, with this product, have UV400 protection. The lens are also available in 5 different colours. Each pair is equipped with 1x Glasses pouch, 1x Microfiber cleaning cloth, 1x Anti-fog mirror cloth, 1x Mini screwdriver 1x Glasses box. This design frame could be fit with any prescription lenses All Lenses Fit By UK Ophthalmic Optician No Additional charges for semi rimless or rimless glazing Prices start from 15 please contact us by message. We got 5 different color lens, if you want this sunglasses, please text me which clip on lens you need, so i can pack it for you:) Frame width: 140mm Lens height: 40.00mm Bridge: 19.50mm Arm length:138.80mm Wood Sunglasses Square Clip On Slim Wood Frame Prescription Glasses Groomsmen Proposal Eye Frames