Brand: ARP Manufacturer's Part Number: 912-0012 Part Type: Thread Chasers Product Line: ARP Individual Thread Cleaning Chasers Automotive Fittings Part Number: ARP-912-0012 UPC: 672036041458 Adjustable: No Thread Chaser Material: Steel Thread Chaser Finish: Zinc plated Quantity: Sold individually. Description: ARP individual thread cleaning chasers are designed to clean dirty fastener holes. They include the correct thread pitch and diameter for the most commonly used threads, and their 3-flute design offers added strength. Order the sizes needed for your applications.