These are replacement Roll Pins that are used to hold distributor and magneto gears in place. Some models are available in spiral versions that have more retention strength for high RMP racing applications. Roll Pins are available in the following sizes:

Automotive:
- 3/16"x 7/8"
- 3/16"x 7/8" (Spiral)
- 1/8" x 5/8"
- 1/8" x 3/4"

Motorcycle:
- 7/64" x 1/2" (Spiral pin for standard motorcycle gear)
- 1/8" x 1/2" (Oversize pin for drilled out shaft/gear)