The park tool sw 18 internal nipple spoke wrench 55mm hex offers an extra long reach 325 85m for those deep section aero rims featuring our dual density ergonomically designed screwdriver handle park tool sw 18 internal nipple spoke wrench 55mm hex screwdriver handled wrench to fit internal spoke nipples on deep section aero rims featuring a 55 mm hex socket to perfectly into the tight surroundings of most rims extra long 325 inch 85 cm spoke wrench socket to prevent