Radius Source Replacement Heads
"I've been using the Radius Source toothbrush and replacement heads for years. Super easy to replace! The bristles are soft but firm enough to clean your teeth. The unique shape really works well to cover more tooth area. We've never lost a bristle, and my adult daughter is hard on tooth brushes. The handle is comfortable and labeled for left of right handed, showing which way to twist." — Lori W.