UDC9138 Ultra - Long Ultimate Trim Combination - 7/8"CD, 1-3/8"CLThe Ultimate Flush Trim Bits for material up to 1 3 8" thick. If you use a lot of templates or use a router bit to flush trim, then this is the best that you can buy. Whiteside Ultimate Flush Trim Bits are perfect when working with templates or when using a router to flush trim matching wood surfaces. The Ultra Long series provides the best performance and quality found on the Classic Ultimate Bits on thicker stock. Compression spiral design, with a 7