Manufacturer: Excalibur Manufacturer Part #: 6673 UPC: 626192066732
They are tunable, allowing you to align the blade so each broadhead flies identically.
The key is that the blades on each individual broadhead are aligned the same way when loaded in your crossbow.
This allows you to do just that with a simple wrench and hex key.
Once aligned, your groups will be dramatically tighter.
Made of high strength stainless steel and proven 150 grain heads (with 1?1/16" cutting diameter) increase front of center weight for pinpoint accuracy when shot out of today's high performance crossbows.