Trend collet reduction sleeve, used to reduce the collet size to take cutters with smaller shanks. Should only be used as a stop-gap, as the correct size collet is recommended.

Should not be used for extensive periods or heavy work.

The TRE63127 Collet Sleeve has the following specifications:

Diameter: 12.7mm (1/2in)
Internal Bore 6.35mm (1/4in)
Bore: 8mm.
Overall length: 30mm.