I wanted to buy a low-cost means for the drilling of holes perpendicular to a flat surface and pushed up to the Wolfcraft drilling aid. The product exceeded my expectations unfortunately not fulfilled. If you do not fix the drilling aid about using a clamp fixed to the base, you have simply too little exact guide and place with your left hand the drilling aid and with your right hand should hold the machine is rather at an angle or the naked eye the Check squareness and use both hands to stabilize the machine. But even if you can force the drilling aid firmly on cuttings (which, for geometric reasons far nich is always possible and the drilling aid + Clamp can also the possible depth neatly limit) then there is still quite a lot of angle play. I have certainly sometime reached into the deep pocket money and bought a drill press. I accounted for the acquisition as ersparenswert.