Gem Instrument Company

Gem Instrument has been a leading manufacturer of precision instruments for over 50 years. We are manufacturers of swivel clamps, dial indicators and magnetic bases as well as custom products. Our state-of-the-art computerized numerical controlled machines ensure quality products. We provide products to manufacturing, assembly and service industries.

Gem Adjustable Swivel Clamps

Swivels designed for your exact applications

  • Anti-vibration lock provides positive, rigid holding power
  • Any combination of 17 standard size holding diameters:
  • Heavy Duty: from 3/8" x 3/8" to 1" x 1" diameter
  • Medium Duty: from 5/32" x 1/4" to 1/2" x 3/8" diameter
  • Available in: stainless steel for sanitary and corrosion-resistant applications
  • Special sizes available | Available with flanged hex nut for greater torque


  • All Clamps available with color coding
  • Stainless steel or other materials as required
  • Metric and special sizes available on request
  • Positive Locks