Fowler Full Warranty 52-585-005-0 Magnetic Base, 2" x 2-11/32" x 1-13/16" Base dimensions 1 year warranty offered by Fowler High Precision Use with milling machines, lathes, etc. Base dimensions are 2" x 2-1132" x 1-1316" (50mm x 58.7mm x 46mm) Accepts all AGD dial indicators and Test indicators with 1/4" post mount V-base for placing on round surfaces. On/off lever releases magnet and is conveniently located No risk of marring polished surfaces