RIDGE TOOL COMPANY - RIDGID THREAD CUTTING OIL: Ridgid the number one name in pipe cutting and threading, makes this thread cutting oil that cools thread and pipe during operation, speeds metal removal, and is ideal for stainless steel applications. Ridgid thread cutting oil is free of chlorine and other halogens, and also free of PCBs and heavy metals. This Ridgid thread cutting oil is listed as Non-carcinogenic so you can use this oil with confidence that you won't be hurting the environment or yourself.