【Upgraded Glasses Ear Hook】Double Hole Round thread Design,great for the eyeglasses which easy slide down, small but easy to put inside your temples tip.Fit for glasses arm width from 3mm to 6mm. 【Widely Use】This Glasses Ear Hook Suitable for daily work, leisure, sports, compatible with For Kids and Adults Sunglasses, Reading Glasses Sport Eyewear, for both adults and children!