Virtual reality (VR) is a growing field of research, which includes visual, auditory, and haptic feedback generation. Haptics, or the sense of touch, is one of the important factors in making a VR experience more realistic. A string-based haptic feedback device was developed to connect with a real tool having the same shape as the virtual tool in the VR environment. This device provides haptic feedback when the virtual tool interacts with other virtual objects. However, this approach requires a real tool in the real space, which can be costly and unrealistic. In this study, using a string-based haptic device connected to a VR controller instead of a real tool to create haptic feedback for touching virtual objects with a rod-shaped tool in VR is proposed. Further, the manner in which the virtual tool's length affects the user's suitability and haptic feedback when using a string-based device connected to the controller is investigated. In the verification, a comparison is made between the suitability and haptic feedback of using a string-based haptic feedback device with a real tool or with a VR controller for the virtual tool lengths of 25 cm, 50 cm, and 100 cm. The results show that a virtual tool length of around 50 cm can provide similar suitability and the haptic feedback with and without a real tool.
