Product Specifications: Made from durable 45 steel, this shaft collar features a 1.5" inner diameter (1.5 inch axle), 2-3/8" outer diameter, and 9/16" thickness. Includes a locking collar with set screws and a wrench for secure fastening. Sold as a drill bit stop collar set of 2pcs, ideal for 2 keyed shaft applications.【Easy Installation】: 1. Slide the shaft collars onto the shaft end, adjust to the desired position, and tighten the screw clamp. 2. For a clamp on vise setup, remove the screws, attach the split collar, and retighten. Perfect for linear rail or hydraulic cylinder stops.【High Reliability】: Crafted from high-strength steel with a black oxide coating, these barbell collars 1.5 inch olympic are wear-resistant, corrosion-resistant, and fatigue-resistant, ensuring a long service life.【Wide Applications】: Ideal as a component locator or weight balancer, these 1.5 inch pipe clamp collars are widely used in marine, fitness equipment, machinery, automotive, chemical, and construction industries. Also suitable for corner clamp setups.【Highly reliable construction】: Manufactured with precision, these shaft collars boast high mechanical strength (tensile strength ≥600MPa) and feature chamfered edges for enhanced locking collar performance without damaging the shaft surface.【TIP】: The shaft collars come with an oil film coating for protection. We recommend wearing gloves during handling.