FAMAG 1639 extension shanks.  

2.5mm Allen key required, not supplied.

The 8mm accepts all 8mm shank FAMAG drill bits including FAMAG Bormax Forstners 22mm and up. 

FAMAG 1639.003

8mm diameter hole

10mm diameter shank

125mm overall length

100mm overall cutting length

FAMAG 1639.004

8mm diameter hole

10mm diameter shank

250mm overall length

220mm overall cutting length

The 10mm accepts all 10mm shank FAMAG drill bits including FAMAG Bormax Forstners 22mm and up. 

FAMAG 1639.001

10mm diameter hole

10mm diameter shank

125mm overall length

100mm overall cutting length

FAMAG 1639.002

10mm diameter hole

10mm diameter shank

250mm overall length

220mm overall cutting length