Gear: pure brass material, the German imports of high-precision lathes,
Size control within 1 silk, superb grinding, no burr, smooth rotation.
(Popular: 100 silk = 1 mm)
Subject: aviation aluminum material, sandblasting effect, anodized, iphone level scrub feel.
Bearing: imported stainless steel R188 type bearing, good wear resistance, long idle time.
