OLFA

OLFA 5003 Knife

Knife
Carbon Tool Steel
0.2 ounces

4.8/ 5 on Amazon4,204Amazon ratings700+bought last month4.5ProductDome score

Better rated than 85%
More reviewed than 74%

High confidenceLast refreshed Aug 4, 2026Amazon data + ProductDome analysis · methodology

Best forAnyone needing an 18mm carbon steel OLFA blade or a knife built around that size

The 18mm carbon steel blade fits OLFA's common standard size, though the mixed handle materials and light weight figure suggest confirming whether this is a full knife or a blade refill.

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ProductDome scorecard

How it ranks among the 246 knifes we track

4.5/ 5ProductDome scoreHigh confidence

Owner satisfaction · 56% of scorecategory median 4.6★4.8

4.8★ across 4,204 Amazon ratings, Bayesian-smoothed toward the category average.

Evidence strength · 17% of scorecategory median 2,048 ratings4.5

4,204 Amazon ratings, weighted on a log scale so huge counts don't drown everything.

Buyer demand · 11% of score3.8

700+ bought on Amazon last month.

Data quality · 11% of score3.8

Brand identity, imagery, description and spec coverage.

The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 246 knifes we track - how the scorecard works · full knifes data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.

Overview

The OLFA 5003 combines a carbon tool steel blade with a handle built from ABS, rubber, stainless steel and plastic. Its blade length is listed at 18 millimeters, matching OLFA's standard snap-off blade width.

OLFA popularized the snap-off utility blade, and the 18mm width here lines up with its standard-size blades rather than the narrower 9mm line. The listing's 5 gram weight figure looks light for a full handle, and likely reflects a blade or component rather than the complete tool.

Carbon tool steel blade
18 millimeter blade width
Mixed handle materials: ABS, rubber, stainless steel
OLFA model 5003

Who it's for

Fits anyone needing a general-purpose utility blade sized for OLFA's standard 18mm knives. Not the right match if your OLFA knife takes the narrower 9mm blade.

Strengths and trade-offs

Drawn from this product's published specifications.

What stands out

Carbon tool steel blade holds an edge
18mm width matches OLFA's most common blade standard

What to check first

Listed weight seems too light for a full knife
Handle materials aren't matched to specific parts

Performance notes

Carbon tool steel holds an edge through repeated snap-offs, and the 18mm width is the more common of OLFA's two blade standards, giving it wider compatibility across the brand's utility knives.

Specifications

Brand	OLFA
Model	5003
Material	Carbon Tool Steel
Item Weight	0.2 ounces
Handle	Abs,Plastic,Rubber,Stainless-steel,Steel

How it compares

This product against the closest alternatives we track in knifes.

Product	Amazon rating	Ratings	ProductDome score
OLFA 5003 KnifeThis product	4.8 / 5	4,204	4.5 / 5
WORKPRO W013053AU KnifeWORKPRO	4.8 / 5	9,700	4.7 / 5
Victorinox 0.6223.G KnifeVictorinox	4.8 / 5	9,400	4.7 / 5
LEATHERMAN 831426 KnifeLEATHERMAN	4.8 / 5	9,800	4.6 / 5
Gerber 31-000345 KnifeGerber	4.7 / 5	16,300	4.6 / 5

Frequently asked

Questions about the OLFA 5003

Common buyer questions answered straight from the product spec data - no fluff, no "it depends".

What blade width does the OLFA 5003 use?

18 millimeters, per the listing.

What is the blade made of?

Carbon tool steel.

Is this a full knife or a replacement blade?

The listing's weight and material details are mixed, so check the product photos to confirm whether it's a handled knife or a blade component.