1. Wipe off the dust and dirt on the surface, and then use the care agent to gently wipe the surface of the sofa one or two times (do not use waxy care products), so as to form a protective film on the surface of the leather, so that the dirt in the future is not easy to penetrate into the pores of the leather. For future cleaning. 2. To avoid sharp scratches on leather. 3. To avoid oil stains, ballpoint pens, inks, etc., stain the surface. If any stains are found, they should be cleaned with leather detergent immediately. If there is no leather cleaning agent, use a clean white towel with a little alcohol to lightly smudge the stain, then dry it with a damp towel and finally use a protective agent. 4. Daily care can be wiped with a wrung wet towel, cleaned with leather cleaner for about 2-3 months, or used to vacuum the surface of the household vacuum cleaner. 5. Place it 5-10cm away from the wall and keep it ventilated. 6. Avoid direct sunlight on the leather. Self-tapping threaded inserts are suitable for creating heavy-duty, wear-resistant and vibration-proof fastenings in materials with low shear strength, such as aluminium, brass, bronze, cast iron or duro and thermoplastics. Threaded inserts with cutting slot are available in steel and stainless-steel versions. Self Tapping Insert,302 Self-Tapping Insert,Self Tapping Insert Type 302,Thread Inserts Type Of 307 Steel Shenyang Helisert Technology Co., Ltd , https://www.helisert.com