Comparison : Item # R 634-ZZ / 16, V Groove Bearings and Wire Straighteners
Item # R 635-ZZ / 21, V Groove Bearings and Wire Straighteners
Item # R635-2RS / 21, V Groove Bearings and Wire Straighteners
Item # R 626-ZZ / 21, V Groove Bearings and Wire Straighteners
Item # R 626-2RS / 21, V Groove Bearings and Wire Straighteners