Carbide Bur Grobet Set Bear Cut Burs 1/4" Shank Set of 8 SAVE $$$ BY CHECKING HOW LONG OURS LAST VS. THEIRS!!!! Dimensions shown are in the following sequence: Head diameter, head length, shank size. Lengths of shank will vary. BEAR BUR CUT (BB) is a double cut bur that was designed to substantially cut manufacturers production costs. The design and cut removes more material per hours, engineered for heavy duty applications, more durable due to the depth of the teeth, more resistant to chipping, the wider teeth design makes longer chips so it breaks up easier, and the profile of the teeth are less prone to filling up with chips. These tools will cut your production costs down!!