The vc1 valve core tool is a small and handy tool designed to make extracting schrader removable presta valve cores and valve extenders simple the 5mm wrench flats provide additional leverage especially useful when removing cores that have been used with sealant this is a perfect take along or portable tool especially for tubeless users and people running deep section rims this valve core tool is anodised in vivid park tool blue to stand out on your workbench