1,Easily attachable and deattachable 2,Corrosion resistance 3,Good quality,Reasonable price 4,Delivery timely 5,4 D-ring Specification : ... the first class product, competitive price and satisfactory service .1,High quality,reasonable price, sample is free2,Surface treatment: Chromium/Nickle3,Eco ... : We have more than 10 years experience of OEM processing High intensity ring binder