Destined to become a classic the park tool sw 20 master spoke wrench is an investment cast workhorse poured from the best steel precisely machined heat treated for hardness then polished and plated the result is a smooth solid steel spoke wrench designed and built to fit perfectly in your hand and provide years of every day service park tool sw 20 master spoke wrench features a classic and maybe your new favourite tool four sided spoke wrench to grab the four corners of