Accessories: Suitable for bench drills and hand drills. Clamp diameters between 19 and 55 mm PLUG-IN ACCESSORY FOR BENCH DRILL: The plug-in converter is easy to install and remove. You can quickly install or remove it yourself Note: The product does not include square hole drills and electric drills Two- stand: for bench drill and hand drill Material: cast steel square hole drill fixture. size: 20 x 7cm Material: steel colour: as shown Package Contents: 1 x Hole Drill Fixing Bracket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.