Welfast Drop-In Anchors also known as Bullet Anchor are internally threaded anchors for bolts and threaded rods. These are zinc plated steel tubular expansion shield and a solid, cone-shaped expander plug. The shield has four equally placed slots for a portion of its length and the bottom part may be knurled. The shield also has a smooth, flangeless top that allows for either flush or countersunk installation. The bottom lip of the shield is tapered to allow maximum depth and holding power.