Carpet Stretcher online store. Crain professional Carpet Stretcher also called "Crain Power Stretcher" in stock. Select a Crain Carpet Stretcher, # 500 Single Case, # 499 Double Case, # 520 Swivel Lock, #514 Carpet Mini Stretcher and Stair Stretcher. Place your order from Carpet Stretchers below and we will ship it today. Back to DRP Tools or Carpet Tools.