Is this metric or imperial ? as others on the reviews say it's imperial ?

Its imperial. Despite the description none of the inserts fitted a 10mm drill.

Can someone confirm if the drill sizes are imperial or metric? It says 6, 8, 10, 11 and 12mm, but some reviews the sizes actually are imperial.

It was imperial. The inserts aern't labeled but none fit a 10mm drill.

What is the minimum panel thickness it clamps to.

The minimum thickness the clamp closes to is approx. 10mm , but the actual block that holds the drill dies is approx. 16mm, so you would need to bear in mind what size dowels to use and how much is left wood around the dowel , I hope this helps

What size are the drill holes and what is the minimum panel thickness it clamps to

Unknown since they wern't marked but they weren't metric as none to fit 10mm drill.

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Self-Centering Doweling Jig Kit – Woodworking Drill Guide for Accurate Dowel Joints, Adjustable Positioning Tool for Thick Timber, Model 105409

Product ID: 63873756

Details

Brand
KATSU Tools
Cutting angle string
6E+1 Degrees
Finish type
Aluminium
Material
Carbon Steel
Shank type
Round

🎯Self-centering precision

🔩Fits 4 imperial drill sizes

🪵Handles up to 55mm thick wood

€ 43.10

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Description

🛠️ Nail perfect joints every time with zero guesswork!

EFFORTLESS SETUP USE - Quick clamp mechanism saves time and frustration—perfect for pros and weekend warriors alike.
PINPOINT ACCURACY EVERY TIME - Automatically centers for flawless dowel holes—ditch the tape measure!
VERSATILE TIMBER COMPATIBILITY - Works seamlessly on square, round, or irregular wood up to 55mm thick—no project too bold.
MULTI SIZE DRILL BUSHINGS INCLUDED - Supports 1/4", 5/16", 3/8", and 7/16" dowels for ultimate woodworking flexibility.
BUILT TO LAST WITH PREMIUM MATERIALS - Durable aluminum body and hardened steel bushings ensure years of precision and reliability.

The KATSU Tools Self-Centering Doweling Jig Kit is a precision woodworking guide designed to automatically align drill holes at the center of wood boards up to 55mm thick. Featuring a durable aluminum body and hardened steel bushings, it supports four common imperial dowel sizes (1/4", 5/16", 3/8", 7/16") and offers quick, tool-free clamping for fast, accurate joinery. Ideal for professionals and DIYers seeking flawless dowel joints with minimal setup.

Specifications

ASIN	B07CY2MZK5
Best Sellers Rank	88,103 in DIY & Tools ( See Top 100 in DIY & Tools ) 702 in Drill Bit Sets
Brand	KATSU Tools
Country Of Origin	China
Customer Reviews	4.0 4.0 out of 5 stars (236)
Cutting Angle String	6E+1 Degrees
Finish Types	Aluminium
Manufacturer	KATSU Tools
Manufacturer Part Number	105409
Material	Carbon Steel, Aluminium
Minimum Bore Diameter	6.35 Millimetres
Model Number	NECALON
Number of Flutes	2
Number of Packs	1
Number of Pieces	6
Set Name	Imperial
Shank Type	Round
Surface Recommendation	Wood
Tool Flute Type	Spiral

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€ 43.10

Duties & taxes included

In stock

Sold byAmazon NetherlandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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

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TrustScore 4.5 | 7,300+ reviews

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Best international shipping I've ever tried. Worth every penny!

3 days ago

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The product exactly matches the description. Very satisfied with my purchase.

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