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General Tools 78 Heavy Duty Steel Automatic Center Punch

General Tools 78 Heavy Duty Steel Automatic Center Punch

Q: Has anyone tried breaking a 1/4" glass plate with this? Did it work?

If you wish to break plate use a hammer, this will work on tempered glass if any thickness

Q: Anyone use one of these to extract broken bolts? Is it strong enough to get a punch for a bit? Looking to remove a bolt inside my engine block.

I dont think john p actually ever tried this. Dont know about the cheaper utility version but the big #78 which Ive had for 15 years will put a divot in anything short of a broken drill bit. Ive removed broken taps with it a few times by softening the metal around the tap then repeatedly punching the tap in reverse. This tool has amazing power. That said, mine misfires about every half dozen clicks but doesnt bother me considering how well it works.

Q: Do i need any machine to use this or take off the bike bolts

I dont understand the question,this is a center punch,not a take off tool.I used mine once,and the tip broke off.It was a piece of junk,so I don't know.If the bike bolts are rusted,or welded,on it seems like to me you are going to have to cut em off.

Q: Would this work well to get a starter dimple for unibit/step bit when going thru metal studs or panel boxes?

It might. It works better if you drill a starter hole with a twist drill first. Usually the step-bit and unibit drills don't have enough of a point to start in the dimple that the center punch makes.

4.2/5

Product ID: 599379915

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Details

Material
Alloy Steel
Colour
Solid Black
Brand
General Tools
Item Weight
136 g
Hole Count
1

🎯Replaceable hardened steel tip

⚙️Adjustable spring tension

🛠️Heavy-duty steel body

Frequently Bought Together

General Tools Heavy-Duty Automatic Center Punch #78 - Nail Punch Tool to Mark and Scribe - Machinist Tools

General Tools 78P Replacement Point for General Tools 78 Heavy Duty Steel Automatic Center Punch

General Tools 88CM Tungsten Carbide Scribe and Magnet, Copper, Replaceable Tip

Description

🎯 Nail every mark with precision and power!

BUILT TO LAST - Durable alloy steel body with rust-resistant black oxide finish
ERGONOMIC CONTROL - Knurled finger grip ensures secure handling and reduces slippage
CUSTOMIZABLE IMPACT - Adjust tension for light or heavy strokes on wood and metal
TRUSTED CRAFTSMANSHIP - From General Tools, a leader in precision tool innovation
PRECISION AT YOUR FINGERTIPS - Automatic spring-loaded punch for exact hole marking without a hammer

The General Tools 78 Heavy Duty Steel Automatic Center Punch features a robust alloy steel body with a replaceable hardened steel tip, designed for precise, slip-free hole marking. Its adjustable spring tension allows for customizable impact strength, making it ideal for metalworkers, machinists, and DIY pros seeking efficiency and durability in one sleek, rust-resistant tool.

Specifications

Material	Alloy Steel
Colour	Solid Black
Brand	General Tools
Item Weight	136 g
Hole Count	1
Operation Mode	Automatic
UPC	038728310668 031113163498 080050277164
Global Trade Identification Number	00038728310668
Manufacturer	General Tools
Item model number	78
Product Dimensions	21.92 x 7.77 x 4.14 cm; 136.08 g
ASIN	B00004T7RF

Have a Question? See What Others Asked

Has anyone tried breaking a 1/4" glass plate with this? Did it work?

Anyone use one of these to extract broken bolts? Is it strong enough to get a punch for a bit? Looking to remove a bolt inside my engine block.

Do i need any machine to use this or take off the bike bolts

Would this work well to get a starter dimple for unibit/step bit when going thru metal studs or panel boxes?

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

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