| 摘要 |
A blade for a rotary cutting machine includes at least one polygonal shaped opening longitudinally spaced from a central portion of the blade. The polygonal shaped opening is adapted to receive a drive head of a conventional socket wrench, a standard Allen wrench, a Torx head type wrench or other similar tool. The polygonal shaped opening enables a user to generate sufficient torque to prevent the blade from being undesirably rotated while the blade is drivingly connected or disconnected from a driveshaft of the rotary cutting machine. In this fashion, the blade may be changed efficiently and effectively using standard tools.
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