Spindles also known as Line post studs or Insulator studs are used to fix pin type insulators on overhead lines . These primarily replace convention insulator spindles which have tapered threads used with porcelain insulators . With advent of lighter insulator made of polymers design requirements permit use or standard threads even on insulator . Damiano makes this spindles / line post stud using high tensile steel duly heat treated to achieve cantilever loads given the short stalk . The threads are immaculately rolled to ensure perfect fit on the insulator inserts . Ratchets are well formed ensuring easy of removal even after prolonged exposure in harsh environment . Spindles without ratchets are also available on request.