Made special for Shad Mayfield. Featuring our 101 port. This port a welded port as opposed to a pressed port. This gives the bit more bite than a traditional port. It has 1.25” of tongue relief and as 3/8” square twist sweet iron bars. This gives the Thunderbolt a lot of stop and control. Pictured on our Lightning Bolt shanks that are 8” long with 1.75” of purchase.