The Magnus Black Hornet 4-Blade Broadhead boasts a blade thickness of .059 thousands of a inch, and the bleeder blade is 0.040 thousand of an inch. While the quality of Magnus's construction is unmatched, if a blade does break, Magnus will replace it. Sharpen the main blades yourself, or replace them. Either way, the Black Hornet effectively fills every need for a solid hunting broadhead. Features4-blade designBlades that can be replaced or sharpened1 7/16" x 1 1/4"