Pony Model No. 1623-BA Designed for use with Pony\’s Hold Down Clamp. See here Helps Hold Down Clamp to rotate a full 360 around the holding bolt & can be used on any wood or metal surface 4-1/4\” overall length – 3/8-16 thread Product Description Specs This replacement bolt is designed for use with Pony\’s Hold Down Clamp. It helps the Hold Down Clamp to rotate a full 360 around the holding bolt & can be used on any wood or metal surface. See here for the whole Hold Down Clamp. Product Overall Length Thread Size Model # Pony / Jorgensen Hold Down Clamp ~ No. 1623 4 – 1/4\” 3/8 – 16 1623-BA For California Residents: WARNING: Cancer & Reproductive Harm – www.P65Warnings.ca.gov WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood