Safety rules for high school play allow breakaway bases at first, second and third, and a “safe-base” at first. The breakaway bases are knocked free on a hard slide, in the interests of preventing injury. A safe-base at first base has an extension into territory. The batter-runner is to touch the foul-side and the fielder the fair-side. This arrangement prevents lower leg, ankle, and foot injuries and collisions while the players are trying to touch the same part of the base.
[OBR does not permit break-away bases or a safe-base.]