Fixture Removal Kit ComponentsFor use with Fixture Removal Kit (FRK) which can be purchased here. These fixture removers are compatible with any 4mm square head ratchet or torque wrench. Simply press the fixture remover down into an implant connection and reverse the implant out. Available in 3 Sizes: Mini (M): used for implants with a diameter smaller than 3. 5mm Regular (R): used for implants with a diameter between 3. 5 4. 5mm Wide (W): used for implants with a diameter larger