Bilz-style QC Tap Adaptor Size 1 (19mm location) with ER16 front end.

Will hold any tap between M1 & M10 regardless of size of shank.

ISO, DIN, Helicoil, any oddballs - it will hold them all. 

Weston Tooling Ltd are UK agents for Kintek (Italy) and Vertex (Taiwan).

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Price includes 20% VAT.