Phase Tester Screwdriver and Pen Tester: 2 Listings Compared
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A phase tester screwdriver checks whether a wire is live while doubling as a driver for terminal screws. Only one listing in this set combines those two jobs, so this comparison sets it against a pen-style non-contact tester that does the live-wire check alone. The aim is to show what each design gives up.
The research listing was checked on 2026-10-13, and the store listing carries no check date in this listing set. Where a listing contradicts itself, both values are shown.
Quick answer
If you want a screwdriver that also tests for voltage, the AstroAI VTS1000H is the only listing here that says it includes a steel screwdriver at the tail. If you want a light, pocket-sized tester for quick live-wire checks, the SNAKOL pen fits that job, and its listing states a 12 to 1000 volt AC range. The two products do not overlap well, so pick by the task rather than by price or brand.
Side-by-side listing data
| Feature | AstroAI VTS1000H | SNAKOL SK-C01A (store) |
|---|---|---|
| Form | Voltage tester with steel screwdriver tail | Pen-style non-contact tester |
| AC range | 12 to 1000 volts (high), 70 to 1000 volts (low) | 12 volts minimum, 1000 volts maximum |
| Safety rating | CAT IV 600V, CAT III 1000V | Not stated |
| Weight | 85 g | 40.3 g |
| Size | 7.01 x 1.97 x 1.38 inches | 0.87 x 1.18 x 6.5 inches |
| Power | AAA batteries included, specs say corded electric | Battery powered, two AAA batteries |
AstroAI VTS1000H voltage tester with screwdriver
The AstroAI listing describes a two-in-one tool. The bullets say the screwdriver sits at the tail, and that the tool can tell live and neutral wires apart at an outlet, switch or junction box. The listing gives a high setting of 12 to 1000 volts and a low setting of 70 to 1000 volts, selected with the S button.
The listing states visual and audible alerts, a backlit screen, a flashlight, and automatic shut-off after five minutes with no signal or input. Its safety rating is CAT IV 600V and CAT III 1000V. The specs say corded electric as the power source, yet the included components list AAA batteries, so buyers should confirm the power type on the live page.
View AstroAI VTS1000H on Amazon
SNAKOL non-contact pen tester
The SNAKOL listing is a pen with a laser position marker, a flashing light and a buzzer. The bullets say one click tells live and neutral wires apart, and the listing describes the laser as a way to locate a wire breakpoint. The specs give a 12 volt minimum and a 1000 volt maximum for AC.
The listing does not include a screwdriver, a safety category rating or a case. It is a lighter tool at 40.3 grams, and the listing says it runs on two AAA batteries, auto shuts off and gives a low battery reminder. The title is long, but the specs list only a voltage tester as the included component.
How we chose these listings
The research listing is the AstroAI, which names a screwdriver and a voltage check. Store candidates were filtered to items that check for live wires. The SNAKOL pen was kept because it performs the same live-wire check and has an ok status. A 4-in-1 multimeter and a 16-in-1 wire stripper with a built-in tester were left out, because they are different tools.
Worked example: checking a 120 volt outlet
A standard 120 volt outlet sits inside both tools’ stated ranges. The AstroAI high setting covers 12 to 1000 volts, and the SNAKOL covers 12 to 1000 volts as well. A reading of 120 volts would therefore show on either tool.
The difference shows at the low end. On the AstroAI low setting, the stated range starts at 70 volts, so a 12 volt circuit would not register there. The SNAKOL minimum of 12 volts covers that case, but its listing gives no safety category, so a pen is not a substitute for a rated tester on mains work.
What the listings do not say
Neither listing gives an independent accuracy test. The AstroAI bullets note that non-contact readings change with distance, and the SNAKOL listing gives no equivalent note. Neither listing states a warranty period in its bullets, and the SNAKOL listing does not give a safety rating at all.
Frequently asked questions
Does the AstroAI tester include a screwdriver?
Yes. The bullets say a high-strength steel screwdriver is built into the tail of the tool.
Can the SNAKOL pen check a 120 volt outlet?
Its listed AC range runs from 12 volts to 1000 volts, so a 120 volt outlet is inside that range. The listing gives no safety category, so use a rated tester for mains work.
What is the low sensitivity setting on the AstroAI?
The listing says the low setting covers 70 to 1000 volts, while the high setting covers 12 to 1000 volts. The S button switches between them.
What power source does the AstroAI use?
The specs say corded electric, but the included components list AAA batteries and the bullets describe a backlit screen, so the listing is inconsistent on power.
Conclusion
For a tool that drives screws and checks for voltage, the AstroAI VTS1000H is the listing that states both functions. For a light pen that finds a live wire, the SNAKOL listing covers the same 120 volt case. Check the power type and any safety rating on the live pages before buying, since the AstroAI specs and the SNAKOL listing leave gaps.
For more on pen-style testers, see the guide to wire tester pens, the roundup of voltage tester screwdrivers and the walkthrough for using a voltage detector pen.
