An implantable metal device having an active biosurface, the device comprising a non-peptide polymer spacer having a plurality of target sites, at least one or more of the target sites binding a biologically active agent, wherein the target sites are derived from a plurality of carbonyl, epoxy, hydroxyl or thiol target reactive groups or a combination thereof or wherein the biologically active agent is any agent which is capable of modifying the behaviour of cells; a process for generating an active biosurface at the surface of the implantable metal device, comprising contacting a non-peptide polymer spacer having a plurality of target reactive groups with a biologically active agent having one or more reactive functional groups and reaction thereof, thereby binding the biologically active agent to the polymer wherein the, polymer is anchored to the surface of the implantable metal device or subsequently anchoring the polymer to the surface of the implantable metal device by means of unreacted target reactive groups; the implantable metal device having a surface which is receptive for tethering the biologically active agent; a chemical intermediate comprising the polymer spacer anchored to the chemical anchor; processes for the preparation thereof; a method of treating an animal comprising inserting the implantable metal device into a site in need thereof on said animal; and uses thereof as an implantable or subcutaneous metal device, or non-surgical device or a coating thereof, preferably any orthopaedic, cardiovascular, circulatory system or dental implant, tissue engineering device, fixation device, reconstructive device or joint member or trauma-related devices or research tools or particles for shaping into such form.