Check the listing for details. BROOMSTICK/ARMLOCK Lab Golf Directed Force DF3 Putter Insert - Odyssey 2 Ball. Condition: New. Listed at 18.99 USD. Upgrade your Lab Golf Directed Force DF3 putter with a custom "Odyssey 2 Ball" insert in a variety of colors! **Note, this is for the Broomstick or Armlock versions ONLY.** If you're looking for an insert for the standard model, check out my other listing here - https://www.ebay.com/itm/285836480625 Each insert is custom made and 3D printed to fit perfectly in the empty hole giving you a solid and easy to align visual putting aid. A large empty hole can be distracting to some and the Odyssey 2 Ball alignment system has been time proven as a wonderful and extremely effective way to line up your putt. Line up the insert with the small tab facing the back of the putter as represented in the picture. Will stay in place and will not rattle or vibrate.