The Thunderhead Nitro is a 100% American made fixed blade broadhead featuring 3 ultra-sharp blades that deliver a 1 1/16″ cutting diameter.  All steel construction means incredible durability and thanks to the Nitro’s low profile you can expect pinpoint accuracy from even the fastest crossbows.  The Thunderhead Nitro is built to the the most durable, accurate and hardest hitting fixed-blade broadhead in the NAP line.