For safe root canal preparation with a reaming motion Stainless steel ISO 06-40 square cross-section for better fracture resistance ISO 45-140 triangular cross-section for better cutting efficiency Instrument type and ISO size are clearly marked on the handle Radiopaque depth marks Special steel alloy with uniform structure for maximum resistance to fracture and maximum flexibility The non-cutting tip guides the instrument safely along the canal With pre-mounted silicone stoppers Blister of 6 pieces