Bead chain: each set includes a clutch, bracket, bead chain (2 meters in total length), and screws, making it a practical solution for curtain operation. Compatible with 25mm diameter tubes: this accessory kit is designed to fit standard roller blinds with 25mm diameter tubes. Please verify the specifications inside your roller blind before purchasing. Easy to install in just a few minutes: simply drill holes into the ceiling or wall, then secure the bracket. Can be mounted on the top, side, or front, and supports both left and right-hand operation. Main materials: POM + reinforced stainless steel core; offering high hardness, rigidity, and wear resistance. Blind roll spare parts replacement repair kit: this mounting bracket is suitable for crank-operated external and indoor roller blinds, ideal for use in homes, offices, hotels, and other locations requiring roller blinds. Product dimensions: 12 x 10 x 4 cm. Color: White. Package includes: 1 x Curtain control head