what is the difference between VT-00 1& VT-002 besides cost?

I think the difference is the VT-002-06 Vampliers are made with a black oxide coating that helps prevent rust. Here are descriptions from the company website. Description of VT-002-6 An extraordinary pair of pliers which incorporates patented and award-winning technology to solve screw extraction problems. They are the all-purpose pliers with a unique feature. A combination of vertical and horizontal serrations prevents slippage and provides a strong bite to grab the problem screw. These serrations are what differentiate VAMPLIERS® from ordinary pliers. They are much easier to use than screw extractors or locking pliers precisely because of the way they grip around truss, round or pan head screws. VAMPLIERS® are made from — treated high-quality carbon steel — a raw material which commands the highest respect in the world of tools. BRUTE pliers come with a black oxide finish for enhanced rust resistance. VAMPLIERS® have elastomer ergonomic handle grips with a smooth varnished finish. The specially shaped vertically-serrated jaws are designed to remove rusted, damaged or tamper-proof screws in confined spaces. The elaborate angle of serration also enables you to bite and turn truss screws (low-profile dome heads). Description of VT-001 An extraordinary pair of pliers which incorporates patented and award-winning technology to solve screw extraction problems. They are the all-purpose pliers with a unique feature. A combination of vertical and horizontal serrations prevents slippage and provides a strong bite to grab the problem screw. These serrations are what differentiate VAMPLIERS® screw-removal pliers from ordinary pliers. They are much easier to use than screw extractors or locking pliers precisely because of the way they grip around truss, round or pan head screws. VAMPLIERS® are made from — treated high-quality carbon steel — a raw material which commands the highest respect in the world of tools. VAMPLIERS® have elastomer ergonomic handle grips with a smooth varnished finish. The specially shaped vertically-serrated jaws are designed to remove rusted, damaged or tamper-proof screws in confined spaces. The elaborate angle of serration also enables you to bite and turn truss screws (low-profile dome heads).

are the handles made of plastic?

The handles seem to be a soft plastic

Can I use this to extract stripped screws on the 3DS?

Yes, these are better than a complete screw extraction set.

Is it very useful or only for specialized tasks?

It is very useful for removing difficult screws or rivets - for example for restoring an old camping trailer or RV, where sheets of metal are all screwed together but paint, corrosion or pente damage have rendered the original screw slot or hex head useless - these can do a job no other tool can do.

Manufacturer	Vampire Professional Tools International
Part Number	VMPVT-002-6
Product Dimensions	15.88 x 5.08 x 2.54 cm; 125 g
Item model number	VT-002-6
Size	6.25"
Colour	Red Black
Style	6.25" Black Oxide Pliers
Material	Metal
Item Package Quantity	1
Handle material	Metal
Measurement System	Metric
Certification	UL, VDE
Usage	Cutting,Teeth,Cutter
Included Components	handtools, pliers & cutters, side cutting pliers
Batteries included?	No
Batteries Required?	No
Item Weight	125 g

Vampliers Brute 6.25" Screw Extractor Pliers with Wire Cutter. Ideal for Damaged/Stuck Screws & Fasteners. Made in Japan from High Carbon Steel with Black Oxide Finish

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