The Dr. Grip Ace mechanical pen has evolved the Dr. Grip, which is gentle on the neck, shoulders, and arms that can withstand writing for a long time. New mechanism "LAS-1 LAS-1 SIGN) will display the sign on the axis window when the spare lead is left in the wick tank. With a single spare lead remaining, when the lead you are writing becomes short, the spare lead starts to progress down toward the nib, and the upper part of the wick tank will slide down along the spare lead and display the sign in the window position to prevent the sharp lead suddenly..