Various embodiments of a surgical end effector are provided. The end effector can include upper and lower jaws, and an anvil assembly configured to be releasably coupled to the upper and/or lower jaws. The anvil assembly can include an anvil plate that mates and aligns with the jaw, and staple pockets that align with staple cavities formed in the cartridge for formed staples fired from the cartridge. An adjunct material can be releasably secured to either the cartridge or anvil assembly, such as with one or more sutures.