The Arm Blaster is a piece of curved aluminum about 24″ long and 4″ high that is designed to be worn around the neck when performing bicep curls.

The Blaster keeps your arms in a fixed position against your trunk, with the claim being that this promotes proper form while also isolating the biceps.

It's worn in front of the body with an adjustable strap that rests on the back of the neck/shoulder area. An arm blaster forces the elbows in front of the lifter's torso while they curl, as well as help keep the elbows stationary throughout the movement.