[High Quality Steel] - The child safety bicycle handle is made of high quality steel, strong and durable for long-term use. Fine craftsmanship, resistant to fading and damage. Reliable for everyday use. [Universal Size] - The bike rear seat handle measures approximately 18 cm in length, 12 cm when folded, and 18 cm in height. Fits seat tubes with diameters ranging from 25.4 to 7.8 mm. Compatible with most standard bicycle frames and supports up to 20 kg. [Non-slip Handle] - Designed with a textured, non-slip surface for a secure grip. Helps prevent slipping and enhances safety. Child-friendly design for a more secure riding experience. [Convenient to Use] - Easy to install and remove without disassembling the seat. Features a four-hole clamp with screw fixation to securely attach the armrest to the frame. Compatible with standard bike racks and fits most bicycles. Sleek black design enhances the bike's appearance. [Wide Application] - Adjustable screw allows for secure fitting on various bicycle types, including hybrid bikes, city bikes, mountain bikes, electric bikes, and road bikes.