Trulock Choke Tube EXTENDED BLACK FINISH BROWNING INVECTOR DS TRULOCK BOAR BLASTER Ö 12 GA SPECIAL BBDS12SPL Boar Blaster™ Choke Tubes The Boar Blaster™ style of choke has a totally new internal design consisting of 5 steps with 6 parallel sections. This design has been tested with numerous loads of 9 and 15 pellet 00 and various 000 shells and has shown an increase in pattern density over conventional conical parallel choke designs with every load we have tested. Made from high strength stainless steel with a black oxide finish and knurled head.