The park tool sw 163 internal nipple spoke wrench 312 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 163 internal nipple spoke wrench 312 hex features screwdriver handled wrench to fit internal spoke nipples on deep section aero rims featuring a 316 inch hex socket to perfectly into the tight surroundings of most rims extra long 325 inch 85 cm spoke