Metal cover brings superlative stability and strength.
Safety lock system.
*Sanp-off dull blade to instantly expose a new fresh sharp point.
*Easy slide the "blade Lock" forward to advance blade.
After lasttip is used, slid "Blade Lock" forward and remove used blade.
Slide the "Blade Lock" all the way back to automatically load nest blade.

Q'ty: 12/240pcs 
G/N: 25/24
Meas: 49x48x48cm