These Anti-Tippers help keep patients safe by preventing the wheelchair from tipping over in the case of it being thrown off-balance. They are compatible with our K1, K2, K7 and Reclining wheelchairs. Stabilize wheelchair and prevent it from tipping forward or backward Compatible with K1, K2, K7, and Reclining wheelchairs Sold by the pair To keep patients safe in their wheelchairs and prevent falls, purchase the Anti-Tippers.