"For he is God's minister to you for good. But if you do evil, be afraid; for he does not bear the sword in vain; for he is God's minister, an avenger to execute wrath on him who practices evil." -Romans 13:4
Although the sword we carry has taken different forms throughout the ages, the tools still hammer out the same work.
This design pays homage to the tireless commitment we must have to our duty against the evils of the world, in order to protect those we love.