•Our nuts are made of high quality carbon steel for corrosion resistance and long life. •These claw nuts help you tighten the screw, and the four claws prevent the nut from deforming. •Simply insert the nuts into the appropriate holes and the 4 prongs will hold them in place. •A set of 100 t-nuts to meet your different needs, each size is M5 x 8 x 18mm. •Ideal for DIYers, carpenters, builders, plumbers and more.