Description The OC45 includes an exclusive double-gated carabiner that can connect in multiple locations. There are 21 possible configurations for the OC45. The medium-sized OC140 includes 2 V-SWAP panels (a panel with elastic tension straps (Tension Strap Panel) and a removable Zippered Parts Folio bag) and an exclusive double-gated carabiner that can connect in multiple locations. Additional panels and a Repositionable Belt Clip (to attach case to a belt or tool bag) are sold separately.  There are 35 possible configurations for the OC140. The large-sized OC170 includes 1 V-SWAP panel with 2 elastic pockets (OC170 2-Pocket Panel), a Zippered Parts Panel (OC170 Zippered Parts Panel), and an exclusive double-gated carabiner that can connect in multiple locations. This case also comes with a Repositionable Belt Clip (“RBC”) to attach the case to your belt, or alternatively to a larger tool bag.  Additional panels may be purchased separately. Alternatively, choose 1 – 2 V-SWAP panel options and 1 Zippered Folio for up to 36 possible configurations for the OC170.