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.  

Individuals:

• 1639.001 is 125 mm long x 16 mm OD and will work with bits sized 7/8” or 22mm to 2-1/8" or 54mm with 10mm shanks
• 1639.002 is 250 mm long x 16 mm OD and will work with bits sized 7/8” or 22mm to 2-1/8" or 54mm with 10mm shanks
• 1639.003 is 125 mm long x 16 mm OD and will work with bits up to 3/4" or 20mm with 8mm shanks
• 1639.004 is 250 mm long x 16 mm OD and will work with bits up to 3/4" or 20mm with 8mm shanks
• 1639.005 is 125 mm long x 22mm OD and will work with bits larger than 2-1/8" or 54mm with 13mm shank
• 1639.006 is 250 mm long x 22mm OD and will work with bits larger than 2-1/8" or 54mm with 13mm shank
• 1639.007 is 400 mm long x 22mm OD and will work with bits larger than 2-1/8" or 54mm with 13mm shank
• 1639.008 is 400 mm long x 22mm OD and will work with bits larger than 2-1/8" or 54mm with 13mm shank
• 1639.009 is 400 mm long x 22mm OD and will work with bits larger than 2-1/8" or 54mm with 13mm shank
• 1639.010 is 80 mm long x 16 mm OD and will work with bits sized 7/8” or 22mm to 2-1/8" or 54mm with 10mm shanks
• 1639.011 is 80 mm long x 16 mm OD and will work with bits up to 3/4" or 20mm with 8mm shanks

Sets:

• 1639.503
  • Includes 1639.001, 1639.002, & 1639.010. Comes in a wooden box and with a 2.5mm allen key. Works with 10mm shanks. 
• 1639.583
  • Includes 1639.003, 1639.004, & 1639.011. Comes in a wooden box and with a 2.5mm allen key. Works with 8mm shanks.