Tweezers

The Tweezers (ピンセット) or Pincet Glove is an attachment-type manipulator for microscopic object interference.

Background
It is essentially some mechanical fingers that let you grab particles that are even smaller than atoms. It was created to use things like magnetism, light waves, and electricity to “absorb” these particles. It is normally kept in a larger form to help keep it from being stolen. When in it's optimized form it looks like a metal glove. The index finger and the middle finger each have a long glass claws coming from them and the glass claws had what looked like even thinner metal stakes in them. On the back of the hand was a small monitor that looked like a cell phone. The glass claws extract the particles and the metal stakes inside carry out various measurements.

Battle Royale Arc
Kakine Teitoku stole the Tweezers from a Particle Engineering Lab in School District 18 near Kirigaoka Girls' Academy in an attempt to get a hold of one of the UNDER_LINE. After defeating SCHOOL, Tsuchimikado Motoharu of GROUP recovered the glove from the remains of Kakine Teitoku in the aftermath of his fight with Accelerator and used it to decode data from a UNDER_LINE. Doing this they discovered the name DRAGON alongside those of GROUP, ITEM, SCHOOL, BLOCK, and MEMBER.