Famag Extension Shanks for Imperial and Metric Forstner Bits

These FAMAG extension shanks will work with all Famag forstner bits and are perfect for drilling deep holes and for wood turning. Each extension has 4 sets screws with 2 clamping surfaces and require a 2.5mm Allen key (not provided). Extensions have hex shanks and can be linked together.  

1639.001 is 125 mm long x 16 mm OD and with work with bits sized 7/8” or 22mm and larger with  10mm shanks

1639.001 is 250 mm long x 16 mm OD and with work with bits sized 7/8” or 22mm and larger with 10mm shanks

1639.003 is 125 mm long x 16mm OD and with work with bits sized 3/8” or 10mm to 3/4” or 20mm with 8mm shanks

1639.004 is 250 mm long x 16mm OD and will with work with bits sized 3/8” or 10mm to 3/4” or 20mm with 8mm shanks