No. 180853 is waterproof and shockproof.
No. 80554 features a “T-handle” design.
No. 80555 has an antiroll flat bottom.
No. 80556 features a rotary head.
Nos. 80557 and 80558 have an 8"L probe.
No. 80559 features a black-with-white face plate, on/off switch, automatic power off and is waterproof. Includes a polycarbonate case and 1.5V battery.