Whiteside Spiral Upcut Bit, 3/8 in. SH x 3/8 in. CD x 1 in. CL is designed for precision and efficiency in woodworking. This Whiteside RU4100 Spiral Upcut Router Bit features an up-cutting action that effectively pulls chips up and out of mortises, slots, and holes, making it i for deep cutting tasks where excellent chip is essential. Its spiral shape delivers a shearing action that ensures extra smooth cuts regardless of the grain direction. Crafted from solid carbide and double fluted, this bit combines durability with superior performance. Manufactured by Whiteside Machine Company in Claremont, North Carolina, it reliable quality for professional and hobbyist woodworkers alike. Model Number: RU4100