The actual plug works like a brake bleed nipple

Fittings not included

Colony Allen Bolt Flat Head Chrome 10-32 10-Pack

Gives it the classic look

knipex needle nose combination pliers 2OM The actual plug works likeManufactured from special forged tool steel that is multi stage oil hardened. With gripping zones for flat and round material and a milled groove in the gripping area. The cutting edges are additionally precision induction hardened to approx. 60 HRC. Cuts 3. 0mm mild steel wire up to 2. 0mm hard wire. Comes with multicomponent grips, a polished head and black phosphate coating. Overall length: 250mm. Weight: 328 gram.