Replaces 20 millimeter end of Honda OEM tool 07716-0020100. Fits counter balancer nut on: CRF450R 02-07, CRF450X 05-08. Fits Clutch Hub Nut on: PC50 69-70, Z50 68-99, S65 65-69. Fits Crank Shaft Nut on: CA100 (Trail 50) 61-62, CA102 62-69, CA105 (Trail 50) 63-65, CA110 62-69.