Re-usable high quality stainless steel safety hairpins. A useful part, particularly where you require quick access to remove and refit, and of course it is perhaps a little more aesthetic than a cotter type split pin? This size suits M5 diameter We stock these in two other sizes; you may like to order these as well to cover all eventualities? 18532 18533 High quality Japanese construction Stainless steel and can be polished to resemble chrome No unsightly corrosion