ST-A3.0 Ultra Fine Single Blade Nipper

DSPIAE ST-A3.0 Ultra Fine Single Blade Nipper is a high-precision cutter designed to produce clean, low-stress sprue cuts on plastic model parts. Its single-blade design helps reduce crushing and stress whitening around gates, making it a favourite “finish nipper” for Gunpla and other plastic kits.

Ultra-fine single-blade cutting

Unlike standard double-blade nippers, the ST-A3.0 uses a single cutting edge to shear more smoothly through plastic. The cutting face is mirror-polished to reduce resistance and help achieve a cleaner cut surface.

Steel & durability

The blade is made from forged tool/alloy steel and heat-treated to reach approximately HRC 58–64, balancing sharpness with durability. It’s also designed with an opening limiter/stopper system to help prevent damage caused by excessive opening or force.

Cutting capability (materials & thickness)

Designed for plastic model use only, suitable for materials such as: PS, PP, ABS, PE, and resin, with a recommended maximum cutting capacity of up to 3mm.
Not suitable for metal or very hard materials.

Best-practice cutting tips

• Use the two-cut method for best results:

  1. Rough cut from the runner with a standard nipper

  2. Finish cut close to the part with the ST-A3.0

• Avoid cutting thick runners or forcing the blade—this helps protect the fine edge and alignment.

• For a perfect finish, follow up with a glass file / fine sanding if needed.

Key features

• Ultra-fine single-blade design for clean sprue cuts

• Mirror-polished cutting surface for smoother cutting feel

• Heat-treated forged steel blade (~HRC 58–64)

• Ergonomic handles for control and reduced hand strain

• Limiter/stopper to help prevent over-opening damage

• Intended as a finishing nipper for plastic models (≤ 3mm gates)

In the box

May include (varies by packaging run):

• ST-A3.0 nipper × 1

• Protective cover/pouch (often cowhide/leather) × 1

• Limit regulator / stopper × 1

• Cleaning cloth × 1

• Storage case × 1

Care & notes

• Keep the edge protected when stored; avoid dropping.

• Wipe clean after use; add a tiny drop of oil at the pivot occasionally.

• Use only on plastic to maintain blade life and prevent chipping.