Medtronic Burs Medtronic compatible burs We Sell the following Blades Model Numbers. Click on product image for larger image. Model #* Head Size Overall Length Number of flutes Description M-35 5.0mm 84.5mm 8 Medium Stainless Steel Round Cutting High Speed M-33 6.0mm 84.5mm 8 Medium Stainless Steel Round Cutting High Speed