MDDI Tweezers Examination Sterile (200) Precise, sharp and affordable zinc-alloy tweezers which feature a non-slip, serrated tip to ensure precision handling. Disposable instruments reduce cross contamination risks and reprocessing costs. MDDI kits contain high quality, precision made instruments. The probes, restorative instruments and London College Tweezers are manufactured from stainless steel. All instrument plastic is recyclable ABS.