The inner diameter of the product is 3mm, the outer diameter is 8mm, the thickness is 4mm, the screw diameter is 3mm, and each weighs only 1g. These collars are used in automation equipment, machinery manufacturing, automobile manufacturing, etc., including metal processing, manufacturing, automobiles, robots, etc. The collars are made of high-quality metal materials, with rust-resistant and corrosion-resistant surfaces, durable and long service life. These collars can firmly grasp the shaft to prevent parts from sliding or moving. Used for shaft positioning, linear slide stops, and fixing rotating shafts. The split collars can be quickly installed or removed by opening the collar and placing it around the shaft, and then tightening the screws to fix it in place., Weight: 0.0661386786 Pounds, Manufacturer: The Lord of the Tools