The 4 inch Log Cabin Trim Tool, designed by Jean Ann Wright, features exclusive markings to create perfect four inch finished Log Cabin; Half Log Cabin; or Courthouse Steps blocks. After adding each round of 'logs', place the appropriate centering square on the tool over the center square of the block and trim. Since each round is squared up before the next set of logs are added, the results are spectacular. The cutting instructions for the strip width and center square are printed right on the tool! The ruler slides easily over the fabric until pressure is applied. Then, the exclusive gripper holds the fabric in place while cutting, eliminating slipping and miss-cuts! It comes with fully illustrated step by step instructions or view a video demonstration.