A set of 2 or 4 large sandbags to use as weighted anchors at the corner of any Port-A-Field field used on turf hard floors (gym floors concrete etc.) or any surface where inserting anchors into the ground is not possible. Large sandbags should also be used as weighted anchors for the ends of internal lines such as goal lines or midfield lines. Each large sandbag is 12.5 inch x 20 inch in size and comes with a strap with clasp to attach to the field's corner rings and line end rings. A tie string at the top of each bag allows one to easily fill or empty the bag with sand and securely close. Sand is not included.