4-Speed Electric Mini Drill Pen Review

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The ARROWMAX SDS ULTRA PLUS is a cordless mini drill pen built for detail work. It runs at four speed settings between 400 and 700 RPM, has a 500mAh LiPo battery that lasts up to 3 hours, and comes with a Hedgehog Benchtop Press for stable, angled drilling. Four shadow-less LED lights keep your work area visible, and the kit includes 20 double-sided drill bits stored in a CNC alloy box.

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Why Consider This Product?

The SDS ULTRA PLUS stands out in a crowded field of mini drill pens. Here is what makes it worth your attention.

Speed range runs from 400 to 700 RPM across four adjustable modes, giving you real control when drilling wood, acrylic, or other materials. The 2.3 kgf.cm torque (a measure of rotational force) is enough for clean, consistent holes without the drill skating across your workpiece.

The built-in 500mAh LiPo battery is about 40% larger than what you find in comparable tools, translating to up to 3 hours of runtime on a charge. Charging is handled through a USB-C port, and the OLED display shows you the battery level in real time so you are never caught off guard mid-project.

Four shadow-less LED lights sit around the chuck and illuminate the drilling point without casting distracting shadows. This makes a genuine difference when you are drilling small, precise holes in a dim workshop or working on fine detail at night.

The Hedgehog Benchtop Drill Press clips the drill pen into a stable mount that rotates 360 degrees and lets you set exact drilling angles. The CNC-machined aluminium disc holds those angles firmly, which is what you need when accuracy matters more than speed.

The CNC alloy storage box holds the drill pen and all 20 double-sided drill bits in one place. A pop-up switch releases bits quickly without needing a separate key or wrench, so swapping between sizes takes seconds.

Product Quality

The build quality on this drill pen is solid. The CNC aluminium disc and alloy storage box feel sturdy rather than hollow, and the pen itself has a good weight balance for detail work. These are not the kinds of components you find on budget craft tools.

The keyless chuck holds bits securely without wobble, which directly affects how clean your holes come out. For a tool at this price point, the fit and finish are noticeably above average.

What It’s Used For

This is a precision detail drill, not a general-purpose cordless. It excels at tasks that require a light touch and accurate placement.

For woodworking, the adjustable speed modes let you slow down for delicate grain work and speed up for straightforward through-holes. The benchtop press keeps angles consistent when you need repeatable results across multiple pieces.

Acrylic cracks easily if you push too hard or run too fast. The lower RPM settings and fine speed control let you drill through acrylic cleanly without chipping or melting the edges.

Crafters and DIYers will find this useful for small-scale projects like model making, resin work, and custom signage. The long battery life means you can work through a session without stopping to recharge.

Jewelry makers drilling beads, shells, or thin metal sheet will appreciate the combination of low-speed precision and bright LED lighting. The benchtop press is especially useful here because even a small angle error can ruin a delicate piece.

Product Specifications

Specification	Details
Speed	700RPM (adjustable modes down to 400RPM)
Torque	2.3 kgf.cm
Battery Capacity	500mAh LiPo
Battery Life	Up to 3 hours
Charging Port	USB-C
LED Lights	Four shadow-less lights
Drill Bit Storage	CNC Alloy Storage Box
Drill Bit Quantity	20 double-sided drill bits
Drill Bit Size	3/32-Inch
Chuck Type	Keyless Chuck (SDS ULTRA PLUS)
Weight	2.3 kg