These pins are USA made and consists of one rear takedown pin and one front pivot pin, made from T6 Aluminum material. This set fit 5.56mm, 223, 6.8spc, etc. Mil-Spec rifles and does not fit .308 cal. All our products are Laser engraved so your image lasts longer vs. a painted product. Fast and easy separation of upper and lower receiver. Easy to grasp, no fumbling for punch's which are prone for scratch's and needing the extra tools. Shaft's are designed to lock securely in place. These finishes are anodized for long wear as Military Specification's.