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| Coupler Shanks |
| "S" = Short Shank |
"M" = Medium Shank |
"L" = Long Shank |
"XL" = Extra Long Shank |
| "SU" = Short Underset Shank |
"MU" = Medium Underset Shank |
"LU" = Long Underset Shank |
"XLU" = Extra Long Underset Shank |
| "SC" = Short Centerset Shank |
"MC" or "MCS" = Medium Centerset Shank |
"LC" = Long Centerset Shank |
"XLC" = Extra Long Centerset Shank |
| "SO" = Short Overset Shank |
"MO" = Medium Overset Shank |
"LO" = Long Overset Shank |
"XLO" = Extra Long Overset Shank |