Hammer drive anchor: Type:cheese head, into the type expansion screws Material: PA, PE Size: 5*30, 5*35, 6*35, 6*40mm Hammer drive anchor:Type:cheese head, into the type expansion screwsMaterial: PA, PESize: 5*30, 5*35, 6*35, 6*40, 6*50, 6*60, 6*70, 6*80mmOEM is welcome Hammer drive anchor