Cost-Effective Solution: This set includes 8pcs SBR16 shaft collars and a wrench for set screws. Each collar has an inner diameter of 16mm, an outer diameter of 35mm, and a width of 12mm, offering and utility for various applications. Superior Craftsmanship: Crafted from high-quality aluminum alloy, these collars boast high hardness, anti-rust, and resistance. Versatile Applications: Ideal for shaft fixing and positioning, these linear guide stops are perfect for DIY CNC machine tools. They are extensively used in industries such as medical equipment, food processing, mechanical and textile equipment, ensuring a high-quality choice for diverse machinery. Easy Installation: Effortlessly slide the collar onto the shaft and secure it using the included wrench to tighten the screws. Designed to fully engage with the shaft, these collars provide strong locking force without causing damage to the shaft., Manufacturer: Akfldms