Comparison : Item # 150409B, Magnetic / Circular Base Style Track Sign Holder With Ratcheting Heads
Item # 150412B, Sloping / Elongated Base Style Track Sign Holder With Ratcheting Heads
Item # 150413B, Shovel Base / Side Clamp Base Style Track Sign Holder With Ratcheting Heads
Item # 150414B, Plain / Rectangular Base Style Track Sign Holder With Ratcheting Heads
Item # 150420B, Rotating Thumb Clamp Base Style Track Sign Holder With Ratcheting Heads