I purchased 3 sets of laces on line from Senkels after finding them on a Google search. The order acknowledgement and shopping updates were very reassuring considering I had never bought laces from abroad before. The quality is excellent but the ferrules on the laces a little big to fit easily in my Trickers. With some re engineering and a pair of pliers they fit perfectly. Perhaps there was a non metal end option I missed? Very high quality non slip laces and the service was first class and very personal. Highly appreciated and I have no hesitate to recommend Thier product. Just check the eyelet dia on the shoes you want to fit the laces to. Thank you Senkels.