Kwik-Release base disengages from base upon impact. Varsity Bases provide 26 lbs of resistance. Youth Bases provide 19 lbs of resistance and is fully compliant with Little League Rule 1.06. Patented design compresses upon impact. Rubber base won't absorb water and repels dirt. Easily installs in standard 1-3/4" square ground anchors used by all Hollywood bases. Set of 3. Ground anchors and base plugs sold separately.