does the compass lock in place?

Unfortunately neither compass in this kit lock in place.

what size lead does the compass use?

2mm diameter lead... 2mm in diameter - 16mm in length. The compass needs at least a millimeter of lead in the retainer part to be able to hold onto the lead, and that means that about 5mm of the lead is wasted.

Is this a suitable kit to substitute for an oxford geometry set?

Yes, it's very similar: Compact, comprehensive set includes metal compass with pencil holder, metal compass with lead, pencil sharpener, eraser, pencil, ruler, protractor, a set of squares, and one pack of leads. Packed in a reusable plastic storage box.Item PropertiesCategory: Drawing InstrumentsCategory: Ruling & Measuring ToolsBrand: Maped®Type: Drawing and Geometry Set

Maped Study Geometry Set Metal 10 Piece

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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¥3164

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

📐 Elevate your precision game — geometry tools that mean business!

DUAL SCALE GRADUATION - Inch and metric markings for versatile, professional-grade measurements.
PRECISION MEETS DURABILITY - Metal compasses and protractor engineered for flawless geometric accuracy.
ERGONOMIC READY TO CREATE - Comfort-focused design with included pencil, sharpener, eraser, and lead refill for uninterrupted workflow.
BUILT TO ENDURE STUDENT LIFE - Shatter-proof carrying case and robust materials designed for daily academic hustle.
ALL IN ONE GEOMETRY POWERHOUSE - Complete 10-piece set including triangles, ruler, protractor, compass, and essential accessories.

The Maped Study Geometry 10 Piece Set is a premium, metal-based drafting kit designed for advanced students and professionals seeking precision and durability. Featuring two metal compasses capable of drawing circles up to 10 inches, dual-scale ruler and protractor, and a shatter-proof carrying case, this set combines comprehensive functionality with rugged build quality. Ideal for academic, creative, and navigational tasks, it ensures accuracy and longevity in every use.

Specifications

ASIN	B003155XYO
Best Sellers Rank	#115,723 in Office Products ( See Top 100 in Office Products ) #390 in Drafting Tools & Drafting Kits
Brand	Helix
Color	Clear
Customer Reviews	4.6 4.6 out of 5 stars (4,666)
Date First Available	December 14, 2009
Item Weight	2.4 ounces
Item model number	897010
Manufacturer	Maped Helix USA
Manufacturer Part Number	897010
Material Type	Metal, Plastic
Number of Items	1
Product Dimensions	7.48 x 7.48 x 18.98 inches
Size	Study Metal 10 Piece Kit

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