Bioguard scissors rvfm 4058 the handles of these scissors contain a special bioguard formula that allows the slow release of active biocidal silver ions which constantly migrate to the surface of the plastic to kill harmful organisms bioguard is effective for a minimum of 8 years the scissors have high quality stainless steel blades and are 200mm 8in in length suitable for older children in key stages 3 amp 4 and above rvfm 8 14 bioguard seniors scissor singly