Material: Aluminum alloy. CNC processing gear hole, 1 Gear Shifting Hole 5 Degree ,more precision without shaking. Craft handle, very comfortable to operate. Quick positioning at the bottom of common sizes(60°-55°-50°-45°-40°-35°-30°-25°-22.5°-20°-15°-10°-5°-0°-5°-10°-15°-20°-22.5°-25°-30°-35°-40°-45°-50°-55°-60°).
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