Quick view Powers 3/4" x 2 3/4" Hex Nut Lock BoltĀ® 5050S (Box of 10) Box of 10. The Lok-Bolt anchor is a pre-assembled single unit sleeve anchor available in carbon steel and stainless steel which can be used in concrete, block, brick and stone. Extension... MSRP: Was: Now: $29.30 Add to Cart