The tapered barrel on these bushings is split on both sides, allowing them to contract more tightly around the shaft than quick-disconnect and taper-lock bushings. They're for use with split-tapered sprockets and pulleys of the same bushing style. As you tighten the included screws, the bushing grips the shaft and pulls it into the sprocket or pulley.

304 stainless steel bushings are often used in food-processing plants and other frequently-cleaned areas because washdowns and humidity won’t corrode them. They have a pilot hole instead of a finished keyway, so you can bore them to the exact dimensions of your shaft.