"This is a great option for people who want to have a force multiplier tool without having to carry anything extra. Almost everyone has their phone with them all the time these days, so having a hardened case that can protect both the phone and the user is a great idea. No special training is required, just hold your phone tight and start striking the assailant with the corners. It couldn't be any easier to use."

“It is very convenient and practical, it helps keep me feel more safe, and looks like a normal phone case.”

“The biggest reason I love this self defense tool is...I always have it with me! It is always ready to go in my hands. Super convenient, super simple, super effective! I am giving them as gifts to my family and friends this year. Self defense for everyone!”

“The Hammer defense system is a very complete tool that anyone can use with very little to no training. Its slim compact design makes it inconspicuous yet very effective! One of the best designs on the market! It's an effective self-defense tool that you can take anywhere.”

"Very practical, and strong build! It is something we have on us everyday tool that serves a purpose 24 hours a day! In today’s world it should be one of several tools we have to deploy."

"Its simple design protects your phone like a normal phone case and can protect yourself too. We live in a world where basically everyone has a phone. Hopefully you never have to use it but in my opinion it could be one of the fastest ways to defend yourself."