The USA Sports by Troy Barbell 1 in. Quicklee Collar snaps right into place for the secure fit you need. Sold as a set of two, they're made of commercial-grade hard plastic and are easy to attach and remove. Fits most one-inch bars.
About Troy Barbell:
Since 1987, Troy Barbell has been developing and manufacturing free weights and fitness equipment while providing unparalleled quality, service, and satisfaction to its growing customer base. Today, the Houston-based company is one of the top free-weight manufacturers in the industry with a diverse range of products and a full commitment to use only the highest grade materials and designs. The Troy family consists of three lines: USA, leading-quality home fitness; VTX, committed to specialty and training applications; and Troy, the premium line of free-weight equipment for commercial and institutional use.