[Strong and Durable] Rivet nuts are made of 304 stainless steel. So rivet nuts are rust-resistant - and durable. Even if you use M6 blind nuts in harsh environment like high temperature, humidity or severe cold for a long time, they will not easily rust or crack. [Excellent Quality]The m6 rivet nut has a mechanical internal thread and the screw mouth is deep. In addition, the thickness is uniform, so the head will not easily crack when processing it into hardwood. [Easy Installation]Just drill a hole corresponding to the size of the m6 rivet nut and use a rivet gun to drive the nut into the hole. [Wide Application] The m6 blind nut not only can be used in mechanic, car, marine, industry, but also great for road bike, DIY furniture work, soft wood or hard. [Attention]The package contains only 60 M6 rivet nuts. Length: 15mm/0.59inch, Gauge: 9mm/0.35inch, Attachment Type: Hollow.