The bracket provides maximum rigidity and the absence of vibrations that break the blades! 1/4- 5/8" bit capacity, holds various sizes of . 10 - 15" winch oscillation. ground and hardened.Completely sealed for maintenance-free operation. Orientation and guidance tools can be locked together (saving time and labor when operations) Allows cutting near mandrel. No vibration the blades will break., Manufacturer: Bumdenuu