Comparator Stand with Square Anvil 

Features:

• Quick positioning adjustment
• Fine adjustment - 180º slide travel with lock
• Used with 3/8" and 8 mm stems and lug backs
• Cast iron base: 6" x 3-7/8"
• Column: 1" diameter x 8" high
• Top of anvil to bottom of indicator holder: 6-3/4"
• Height, base to top of anvil: 2-1/8"
• Throat dimension: 2-1/8"