Replaced original rear BoMar sight with the HD-007-S. The reasons for the replacement were , old tired eyes needed a wider rear opening and wanted to remove all sharp edges on the sight for concealed carry. The sight was not a drop in for my pistol and required fitting, but is very doable, total time was approximately 1 hour. Installed the sight and went off to the range, difference was very noticeable . Able to pick up the front sight faster and with the wider rear opening easier to center it. The quality is excellent, highly recommend for anyone with aged eyes and/or wanting to replace their adjustable rear sight with a fixed sight. This sight met all my requirements and an additional benefit of a lower profile on the rear sight compared to the original BoMar.