220 5 by a suitable attachment cl 220 9 such as a screw among others a balance bar cl 220 14 can be attached to one end of the measurement bar cl 220 8 a blade bh 003t such as a tungsten carbide blade is connected to the measurement bar cl 220 8 additionally another attachment cl 220 14 secures a drill bit cl 220 15 to the axle cl 220 5 the measurement bar cl 220 8 can be mounted directly to the cowl cl 220 3 or alternatively can be mounted through a fixed disk cl 220 7 and a fixed adjusting disk cl 220 6 a reference list of the elements used in the above embodiments is as follows threaded section of the shaft to which hole cutter is mounted aperture for mounting a bar no 31 that supports blade holder blade holder which can be loosened and moved to any location ball bearing insert which permits shaft to rotate while the shield the hole cutter is well suited to cutting very hard materials such as ceramic tiles with these materials a tungsten carbide grit or a diamond grit hole cutter is used the edge may have a saw type edge or.