Features:- 46mm Collar Includes 4 piece shim kit; 0.5mm, 0.75mm, 1.0mm, 1.5mm Includes Pipe attachment & H Beam attachmentDescription:-The Drillmate portable drill press is a unique design for use with pneumatic drills, that attaches to the workpiece & assists in ensuring even pressure is correctly applied to the cutting edge of the annular cutter. Ergonomical- Easier drilling of materials with comfortable stance Safety- Safer drilling of materials both hands used Productivity- Faster and more economical Production of holes*Clamp only, Drill not included*