This knob are special star shape design, great for comfortable hand grip, with ergonomic design and plays a non-slip effect without scratching your hands. Application widely used for mechanical equipment, instrument and apparatus, food and industry equipment. Features - Material: ABS + Stainless Steel - Size: 7.00X3.80X3.80cm/ 2.75X1.49X1.49inch. - These star knobs with plastic handles, thick enough to give you a secure and comfortable grip. - The nuts are made of stainless steel, hold tight, , not easy to break. - This plastic hand knob screw is easy to install and remove and does not require any tools. - Plastic screw-on handle clamping knob for mechanical equipment, instrument and apparatus. - This kit includes sufficient quantities, which definitely meet your daily needs. Package list: 2 x screws