High Current Probes
The probe diameter is between 2.54mm and 4.75mm. The maximum test current is up to 39 amps.

Semiconductor Probes
The diameter is generally between 0.50mm-1.27mm. Bandwidth greater than 10GHz, 50Ω characteristic

Battery and Connector Contacts
Generally used to optimize contact effect, good stability and long life.

Automotive wiring harness test test probe
Professionally used for automotive wire harness on-off detection, diameter between 1.0--3.5mm, current in 3----50A
In addition to the above types, there are temperature probes, Kelvin probes and so on, which are less used.

No	Overall Length/Travel (mm)	Minimum Test Gap (mm)	Diameter of Needle (mm)	Spring Pressure (g)
DLDx290	36.00	4.50	2.90	560
DLDX420	44.50	6.00	4.20	380
KGX-250	37.00	3.50	2.49	180
KGX-300	49.00	4.00	2.98	150
DR X4×6780	67.80	8.00	M4	350
PHX18 DR7	50.00	8.00	3.45	530
RDX050	43.65	1.27	0.95~1.05	140
RDX075	43.3	1.90	1.32~1.47	140
RDX100	43.3	2.54	1.67~1.83	140
1353L	55.5	3.96	1.98	(150)380
CSX--06	10.5	1.91	0.98	(50)100
CSX--6	9.70	2.54	1.36	(60)110
GX1353	36.5	2.54	1.36	180(280)
GX1353	55.5	2.54	1.36	250
SX1353	55.5	3.18	1.65	(180)340