Magnetic Force 176 lbf (782 N) Clamping Hole 3/8" (9.53 mm) 63.5 mm x 50.8 mm x 54 mm Height (Base to top of pole) Support Rod Insert Clamp Knob 9-1/8" Possible Cause Nut Solution Incorrect measurement 1. Measuring device improperly fastened 1. Refer to the "OPERATION" section for fixing instructions, and read the user's manual of the measuring device being used Base will not magnetize 1. Surface is not suitable 2. Magnet deteriorated from improper use or storage 1.