Dimensionless are identical to L base 3 but instead of one slot running left -right this base has 6 captive style slots running from front to back. Captive style slots are spaced every 3/8 inch (9.5 mm)
Base plate has been also equip with two safety stops. It may not be first choice for users who need to access ports on left side but may of us don't use them at all.
4.875 inch long L bracket assemble
1.5 inch wide
Weight 4.1 oz (116 g