Sights fit standard 3/8" dovetails and are for use as replacement sights for Winchester and Marlin centerfire lever action rifles. The big white front dot, coupled with the buckhorn-style rear sight creates a fast, easy-to-acquire sight picture that is great for competition or close range hunting. May require minor fitting. This is intended as a front sight replacement on Winchester and Marlin recent-production centerfire lever rifles. Width at bead is 0.142".