・ By developing the Ultra Screw which applies the screw rotating force only to one direction of pressing, the work can not be scratched and lifting at the time of work tightening can be prevented, so accurate chucking is possible. In addition, by mounting the resin work guard on the Ultra screw, the soft material will not be scratched.
・ There is an integral type and a division type, but the UVH – 40 of the division type and integral type has a structure that can be corrected and chucking is possible arbitrarily.