Wej-it anchors, wedge anchors. Boxed and sized for industrial users. Time tested, proven reliability - An industry favorite for over 48 years. Bolt size is hole size - For precision placement of equipment with pre-drilled holes. Works first time, every time - Eliminates "turning-in-the-hole" during setting. Exclusive "positive wedge connection" - Minimizes wedge loosening due to vibration. Fully assembled & ready to use - For unparalleled convenience on the job site. Zinc plated to ASTM B-633, Fed. Spec. QQZ-325C, Type II, Class 3, Clear Chromate added. Federal Specifications: FFS-325 Group II, Type 4, Class 1.