PRODUCT Ratcheting Brake Piston Spreader Wrench Caliper Pad Install Tool Press Ratchet. Title: Ratcheting Brake Piston Spreader Wrench Caliper Pad Install Tool Press Ratchet. Ratcheting Caliper Spreader is equip with 2pc steel plates (4-5/8"L x 2-3/8"H) for Single, Twin or Quad Piston Calipers.