Probes with protection against slipping?
One variant of this is called "shrouded" probes.

These may have covers which are spring loaded and move away or the shroud may stay in position and need the tested point to intrude into the shroud end.



Just what the doctor ordered:

Fused probe bodies with 4mm contact tips. The tip are covered with a spring loaded sheath for added protection. Unscrew the tip to access and replace the fuse. Probe bodies are marked with the rating of the internal fuse.

From Cal Test electronics $14.93.  



Materials: Body: Polyamide (Nylon); Contact tip: Brass, Nickel Plt.
Banana Contact: BeCu, Nickel Plt.
Set available in red and black pair



RS India grip probe.
 Made to grip a standard test point





Extech TL810 Electrical Test Lead Kit, Double insulated with CAT III-1000V safety rating, Two 40" (1m) PVC lead extensions (1000V rating) with shrouded banana plugs on both ends, Two very sharp, extra long 0.3" (7mm) stainless steel tipped plug-on test probes, Two stainless steel flat tip test probes (0.6"/15mm long), Two plunger activated retractable jaw clips with a wide 0.75" (19mm) jaw opening (TL-810 TL 810) $45/set From





Double Insulated 
4mm jack 
Conforms to BSEN61010 
Fully Shrouded and insulated to HSE GS38 
Suitable for all BS7671 BSEN61557 Alphatek - Metrel testers 
Other colours available . From



Same people 

Double Insulated 
4mm jack 
Conforms to BSEN61010 
Fully Shrouded and insulated to HSE GS38