What is the maximum diameter? The description says 18" while the video says 24"

With the "extender leg" attached I am able to open the compass to a diameter of 11.5". I don't see how you could expand it to 18" or 24".

Can you use this with other drawing utensils like markers?

Yes you can use markers and pens and pencils. Built in there is a lead, but there's an attachment that lets you use any kind of writing pen/marker/pencil that is up to 1/2 in diameter.

What is the diameter of the lead? I need more than the standard black lead. Most compass's are 2mm>

This is also 2mm. Make one, there's plenty of cool compass plans available online. That's what I did for my trammel points (beam compass)

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Mr. Pen- Professional Metal Compass Set, 7 pcs | Precision Drafting Compass with Extension Leg, Pencil Holder, Extra Lead & Needles, Geometry Tool for Drawing Circles, Math

Mr. Pen- Professional Metal Compass Set, 7 pcs | Precision Drafting Compass with Extension Leg, Pencil Holder, Extra Lead & Needles, Geometry Tool for Drawing Circles, Math

Product ID: 110451749

📏Draws circles up to 18 inches

🧰7-piece set with extra leads, needles & screwdriver

⚙️Spring bow head with push-button adjustment

R$149

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Description

🖊️ Master every curve with precision and style!

EFFORTLESS ACCURACY - Spring bow head and center wheel with push-button mechanism prevent unwanted leg movement for flawless drafting.
DURABILITY YOU CAN TRUST - Crafted from premium metal for long-lasting use, ideal for engineers, architects, and students alike.
ALL IN ONE PROFESSIONAL KIT - Includes pencil holder, extra leads, spare needles, screws, and screwdriver in a sleek reusable pouch.
CARRY CONFIDENCE EVERYWHERE - Compact, lightweight design fits easily in your bag—be ready to impress in every meeting or class.
PRECISION MEETS VERSATILITY - Create perfect circles up to 18 inches with the extension beam for math, art, and design projects.

The Mr. Pen Professional Metal Compass Set is a 7-piece precision drafting tool designed for professionals and students. Featuring a universal adapter, extension leg for circles up to 18 inches, and a spring bow head with push-button adjustment, it ensures stable, accurate drawing. The set includes extra leads, needles, screws, and a screwdriver, all housed in a reusable pouch for easy transport. Built from premium metal, it balances durability with portability, making it perfect for math, geometry, art, and engineering tasks.

Specifications

ASIN	B07MJVSB7D
Best Sellers Rank	#31,038 in Office Products ( See Top 100 in Office Products ) #16 in Drafting Compasses
Brand	Mr. Pen
Customer Reviews	4.2 4.2 out of 5 stars (2,658)
Date First Available	January 11, 2019
Is Discontinued By Manufacturer	No
Item Weight	4.2 ounces
Item model number	GP01
Manufacturer	Mr. Pen
Manufacturer Part Number	GP01
Material Type	Metal
Package Dimensions	6.69 x 2.76 x 0.67 inches

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R$149

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Brazil.

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