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The 428 HD is a consistent further development of the proven 428H
For greater comfort of movement
unlikeIndustrial 2RS type ball bearings offer low torque resistance and hence weak resistance to water intrusion
8 x 30mm (4)
Lock nut at base of each tip allows 360 degree adjustment or removal of one tip for use in tight spaces
LASER TOOLS Refractometer stock The 428 HD is aThe refractometer is a precision instrument which tests the freezing levels of Antifreeze and battery fluids and has an automatic temperature compensation facility. Contents: refractometer, precision screwdriver for the calibration screw. Tests the freezing levels of antifreeze and battery fluids. Automatic temperature compensation. Includes dropper for collecting fluid and plastic storage case. Also works on modern long life antifreeze (OAT) and
