Conmed Drills We Sell the following Drill Model Numbers. Click on product image for larger image. Model #* Drill Body Diameter Overall Length Useable Length Fitting Type Description 256-01-21 1.6mm 127mm 101mm Jacobs Chuck Twist Drill 256-01-22 2.0mm 127mm 101mm Jacobs Chuck Twist Drill 256-01-23 2.4mm 127mm 101mm Jacobs Chuck Twist Drill 256-01-24 2.8mm 127mm 101mm Jacobs Chuck Twist Drill 256-01-25 3.2mm 127mm 101mm Jacobs Chuck Twist Drill 256-01-26 3.6mm 127mm 101mm Jacobs Chuck Twist Drill 256-01-27 4.0mm 127mm 101mm Jacobs Chuck Twist Drill 256-01-28 4.5mm 127mm 101mm Jacobs Chuck Twist Drill 256-01-29 4.8mm 127mm 101mm Jacobs Chuck Twist Drill