Abstract: A tool holder apparatus for attachment to a workstand, particularly an engine workstand, is disclosed. The apparatus includes a support arm to be affixed to the workstand having a clamp on the lower end that affixes the support arm to the workstand and a vertical spindle on the upper end. A lower swivel arm is pivotally mounted at one end to the support arm spindle for movement in a horizontal plane. The lower swivel arm has a vertical spindle on the end opposite that which is attached to the support arm spindle and carries a lower tray thereon for rotational movement about the swivel arm spindle. The lower tray has a plurality of dividing walls defining separate bin areas for items of hardware for the engine being worked on. A spacer sleeve is placed around the support arm spindle above the lower swivel arm. An upper swivel arm is mounted at one end to the support arm spindle for pivotal movement in a horizontal plane about the portion of the spindle extending through the spacer sleeve.