The Monadnock Mariner baton is manufactured from aircraft grade 4130 strength alloy steel tubing. This type of steel is used on aircraft because it is both strong, and lightweight. The electroless finish provides unmatched corrosion resistance. The lightweight & sturdy construction of this baton enhances striking potential. This friction lock baton is precisely manufactured to ensure sturdy lockout that makes the baton feel solid in the users hand. This means these batons will not wobble jiggle or have any play when it is in use. Monadnock offers a lifetime warranty against manufacture defects on this USA made baton.