We are Hafren Fasteners We are manufacturers & wholesalers of fasteners …but not just any, fasteners we manufacture and supply security & tamper resistant fasteners; special headed screws, nuts & bolts which are either permanently fixed, or removable only by using a matching driver tool. We stock the widest range of security fasteners available; if we don’t have what you need we’ll make it just the way you want, At Hafren we are able to offer bespoke made to measure security fasteners.