<< CORE BIT EXTENSIONS CORE BIT EXTENSIONS More Views Product Description Have a special application? We make custom extension rods to handle your needs quickly! *Extensions also fit dry hole saw and thin-wall core bits Length Description Thread Fits Bit Size Part Number Catalog Number 4” 125-4 1.250”-7 1-5/8” & up 4400001 01863 4” 125-4-S water sprayer 1.250”-7 1-5/8” & up 4400002 01864 6” 120-6 5/8”-11 up to 1-1/2” 4400003 * 01866 6” 120-6 7/8” O.D. up to 1-1/2” 4400166 55999 6” 125-6 1.250”-7 1-5/8” & up 4400004 01869 12” 120-12 5/8”-11 up to 1-1/2” 4400005 * 01870 12” 120-12 7/8” O.D. up to 1-1/2” 4400167 55696 12” 125-12 1.250”-7 1-5/8” & up 4400006 01873 24” 125-4 1.250”-7 1-5/8” & up 4400042 01909 36” 125-36 1.250”-7 1-5/8” & up 4400007 01877 48” 125-48 1.250”-7 1-5/8” & up 4400024 01897 6” 187-6 1.875”-7 Optional large bits 4400141 01962 12” 187-12 1.875”-7 Optional large bits 4400113 01945 * Required Fields Additional Information Size No