Exact as shown
softer than aircraft rivets but enough for anchor-nuts and a lot better then blind rivets. for good squeeze you can take Knippex parallel waterpump plier or any other "parallel" plier too. push rivet head with plier down to hole and then after squeeze. to calculate rivet length: material thickness + 2x of rivet shaft diameter and you squeeze up to flat to ½x rivet diameter. just looking aircraft maintenance manuals like SRM(Structure Repair Manual) there is descriptions;))