Comparison : Item # K-555-5/8, 555 Roll Staple (1M)
Item # K-555-3/4, 555 Roll Staple (1M)
Item # K-RR1-5/8, RR1 Roll Staple (1M)
Item # K-RR1-3/4, RR1 Roll Staple (1M)
Item # K-RR5-5/8, RR5 Roll Staple (5M)