woodruff key 3x3.7mm for Simson S50, S51, S53, S70, S83, SR50, SR80, KR51, KR51/1, KR51/2, SR4-1, SR4-2, SR4-2/1, SR4-3, SR4-4 4

3x3.7mm woodruff key according to DIN6888 for the primary gear pinion (crankshaft) on the clutch side suitable for Simson Moped / Mokick S50, S51, S53, S70, S83, SR50, SR80, KR51, KR51/1, KR51/2, SR4-1, SR4-2, SR4-2/1, SR4-3, SR4-4.