The brake caliper is supposed to be direct bolt on design and an exact fit for my 2001 H-D Fat Boy. The OEM bolts would not fit the threads bored on this caliper. The caliper does not come with bolts of its own. After consulting with DK, I decided to return the part rather than attempt to purchase bolts that may or may not fit with the caliper. I can't vouch for the effectiveness of the caliper since I never used it. Out of the box, it is an attractive OEM style brake caliper in chrome.