Each plastic roller blind is used with two metal screwstwo plastic pillars. The double-hole transparent P-hook screws are easier to install than the single-hole hook,the roller blind safety clips for cord can be installed on the wall more firmly. If the screws are not strong, plastic pillars can be added to make them more secure. The transparent P-hook screws are made of high-quality plastic, have strong chemical resistance, can be reused for a long time, have excellent stability,have a certain surface hardnessare not easy to break. But to ensure the safety of children, please install the roller blind clips on a wall at least 1.5 meters above the ground. No sharp point on the top of the child safety roller blind clips,the plastic material is smooth, so it will not hurt your hs easily. Smallexquisite, lightweightflexible to install. It can be used with screws, plastic pillarsconnor clips to increase home safety, especially when there are children. They are suitable for most types of Roman blinds, such as roller blinds, Roman blindsvertical blinds, etc. The transparent plastic P clipplastic chain connors, the transparent white plastic material used is suitable for all types of blinds. Each package contains 40 products. There are 6 Roman blind safety clips + 12 screws + 12 plastic pillars + 10 connor clips, which is enough to meet your different needs at home or in the office.