All Items Here are all the products in this category: • SRD220 - 1/4" Down Spiral Bit • SRD230 - 5/16" Down Spiral Bit • SRD235 - 3/8" Down Spiral Bit 1" CL • SRD245 - 3/8" Down Spiral Bit 1-1/4" CL • SRD253 - 1/2" Down Spiral Bit 1" CL • SRD255 - 1/2" Down Spiral Bit 1-1/4"CL • SRD260 - 1/2" Down Spiral Bit 1-5/8"CL • SRD265 - 1/2" Down Spiral Bit 2"CL