<< >> Premium Black Large Diameter Wet Core Bits - SOLID BACK Solid back for heavy duty applications. Product Description Solid back for heavy duty applications. Diameter Hub Part Number Catalog Number 12 1-1/4 In. - 7 BP12000 05361 14 1-1/4 In. - 7 BP14000 05417 16 1-1/4 In. - 7 BP16000 05462 18 1-1/4 In. - 7 BP18000 05498 20 1-1/4 In. - 7 BP20000 05536 22 1-1/4 In. - 7 BP22000 05562 24 1-1/4 In. - 7 BP24000 05584 * Required Fields Additional Information Size No