Creative Grids 10in Log Cabin Trim Tool Duo - The 10in Log Cabin Trim Tool Duo features exclusive markings to create perfect finished Log Cabin; Half Log Cabin; or Courthouse Steps blocks up to 10in. But, in this case, there are two sets of markings - one set for 1in finished logs and additional markings for 1/2in finished logs. Make log cabin blocks with all the same width of strips, or combine the two widths for limitless design potential! After adding each round of logs, place the appropriate centering square on the ruler 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 widths and center square are printed right on the tool!