STRONG & STURDY - Each pack contains 50 plastic glider hooks. Made of thick, heavy-duty plastic that won’t break under pressure, resulting in a hook that’s perfect for light & heavy curtains. UNIVERSAL SIZING - Measures 27mm (L) x 8mm (W), & designed to fit 99.9% of rails & tracks. Stays on the glider, & will not loosen, fall, or slide off. Provides a safe & secure hold no matter what. SMOOTH SLIDING - Each piece is rounded to provide an extremely smooth, back & forth gliding motion. Easy to move, & causes less noise than normal hooks due to our extra smooth finish. EASY TO INSTALL - Easy to attach & remove without any issue. CE compliant, 100% recyclable, & made from safe, high-quality POM plastic that will last you for decades to come. 3 YEAR GUARANTEE - Designed in Britain. We are so confident in our product that if you are not completely satisfied within 3 year, then contact us, & we will provide a full refund immediately.