Simpson CIGV3KT Structural Injection Epoxy Gel 3 Gallon Kit Moisture Tolerant Concrete Crack Repair Mortiser Strong Drive SDS Heavy Duty Connector screws Strong Drive SDS Heavy Duty Connector screws and (1) heavy hex anchor nut Screw with Screws is a self drilling mechanical anchor from Simpson engineered to deliver greater holding capacity in gypsum board drywall than screws alone Decreases in viscosity under pressure for increased flowability ensures the epoxy penetrates deep into narrow or irregular cracks when injected provides the volume needed for larger concrete repair projects while remaining compatible with standard metered injection equipment