These Shock caps are the all in one cap for the EB48* and SCT410 they are capable of being used for standard build of shocks with the bleeder hole on the side emulsion style with a screw in the cap and vented build with a hole in the top of the cap and side with a bladder. For more detail on how these caps work and where to drill please see page 18 of the SCT410 instruction manual here:

http://www.teknorc.com/tekno5/wp-content/uploads/2012/12/SCT410instructions.pdf

*Note: when used on the EB48 some parts are needed to complete the emulsion style build: TKR 6009TKR1341 and TKR5125