16018MH- 德式輕薄柄 彎度75°雙梅花扳手組 75° Double Ring Wrench Set

Ring wrenches are less likely to loosen once they’ve been twisted onto the fastener because they sit flush against the fastener from all sides. This not only allows for wider rotations, but also provides a wider contact area than open-ended wrenches. A typical ring wrench size is 12-points, so-called because it has 12 points and troughs.

12-point profiles allow wrenches to more easily lock onto fasteners in a smaller space than a 6-point (hexagonal) profile does, which allows for greater tightening. Hexagonal fasteners can only be used with 6-point wrenches, while 12-point wrenches can be used on either hexagonal or square bolts. Other profiles are available but they tend to only be used for one application.