Curt 42178 Switch Ball Trailer Ball Set (1-7/8" & 2" Balls, 1" x 2-1/4" Shank)

Fits 1-7/8" or 2" couplers and accepts up to 6,000 lbs. GTW (depending on ball) Exclusive 'J' groove design ensures a secure system No tools, coins or pins required for trailer ball installation Shank bears the weight, freeing the coupler from friction and binding Constructed from high-strength steel Protected by a premium grade, nickel chrome-plated finish Zinc-plated hex nut and helical lock washer for secure mounting Independently tested in accordance with SAE J684 for safety and proven safe U.S. patent# 5,169,168; Canadian patent# 1,325,445