●This product is ordered by the lot. Purchase unit: 100 pieces; This is a welding anchor that can be hammered onto objects and directly welded to the hardware of the instrument; Ideal for fastening the window frame of the sash; Insert type; Outer diameter: 0.4 inches (10 mm); Total length: 2.2 inches (55 mm); Drill diameter: 0.4 inches (10.5 mm); Embedded depth: 1.0 mm). Hole Depth: 1.3 inches (32 mm) Box: Steel