30 Pieces Nickel Plated Book Rings and 1 pack Hole Puncher. High quality metal material, nickel plated, not easy to rust, very strong and durable. 1.5 inch / 38 mm diameter (outer ring),3mm in thickness. Easy to use, dislocation open, dislocation close. You can make your own loose pages, scrapbooks, etc. with a gift punch. Meeting your individual needs. 30 Pcs Book Rings 1.5 inch Nickel Plated Steel Binder Circles with Hole Puncher