Shifter Knob Mandrels


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Shifter Knob Mandrels

Shifter Knob mandrels feature a M16 x 1.5. With this thread size there is available for purchase a DIY Insert. From there threaded adapters can be screwed in to get the desired thread size for your car, truck, or SUV. Please read below the instructions below and where to find the inserts and adapters.

Master DIY Inserts:

Can be found from what appear to be two sister companies:
American Shifter:
Johnny Law Motors:


Can be found the same companies above. There are also a few other companies I have come across where they are making the inserts here in the USA.
American Shifter:
Johnny Law Motors: (Use the Drop down menu)


  1. Drill a 22mm hole deep enough to fit the Master Insert in.
  2. Glue the insert into your wood, resin, etc, with 2-part epoxy just as you would our brass inserts.
  3. Wait the full cure time.
  4. Install on the mandrel and turn and finish to your desired shape.
  5. Select and install the proper adapter that will fit your car, truck, or SUV.
  6. Install on car, truck, SUV.

Unsure of the spindle size on your lathe? Check this list we have put together: Wood Lathes Spindle Sizes

All of our Shifter Knob Mandrels:

  • Precision machined here in Honesdale, Pennsylvania, USA.
  • Rust protective black oxide coating.
  • Screw on/off plastic washer.
  • Run true to within 0.002″ of an inch so your work piece runs true.
  • Come with an individual clear plastic case for safe storage.

Simple Shipping:

See ourĀ flat rate pricing and current free shipping offer on our Shipping page.

  • Flat rate for the United States.
  • Flat rate to Canada.
  • For international shipments, please Contact us.

Phone: (570) 253-0112 or Email:


WARNING: This product can expose you to elements including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to Cancer and Reproductive Harm.

Additional information

Shifter Knob Mandrel

1"-8 Spindle, SKM-1-8, 1-1/4"-8 Spindle, SKM-1.25-8