Whiteside Spiral Up / Downcut Bit, 3/8 in. SH x 3/8 in. CD x 1-1/4 in. CL is a high-quality router bit designed to deliver smooth, chip- cuts, especially when working with double-sided laminates and veneers. Known also as the 2 + 2 Compression bit, it features a unique combination of up and down cut spirals that effectively eliminate chipping during trimming. The bit includes a short up cut end flute i for mortising tasks, providing down shear action on the top edge during shallow cuts. Its double-fluted spiral profile ensures the smoothest finish on your workpieces. Crafted from solid carbide by Whiteside Machine Company in Claremont, North Carolina, this bit is built for precision and durability. Specifications include a 3/8" shank size, 3/8" cutting diameter, and 1-1/4" cutting length. Model Number: UD4122M