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Based on the Subtraction layout, bring hand tool to a higher level. T-turn does not have the handle of an ordinary screw driver, so smaller and lighter, which reduces the cost of logistic and production. Its double-ended design provides the hand tool with similar functionality of a maker pan that has two different pan tip sizes at each end. Furthermore, a second T-turn can be connected to the hole at the center of a T-turn, making it a T-shaped hand tool. As two T-turns are connected together, you will find that it is much earlier to apply the turning force. In addition, that's 3 more screwing options than a traditional screw driver!