|Faber-Castell Tri Grip Colour Pencils|
SV stands for the German word "Sekuralverfahren" meaning secural bonding or (secure-all bonding). The SV Bonding is a process of gluing the lead to the wood on both sides and the full length of the pencil. This results in strengthening the lead to prevent breakage, provides for better sharpening, which produces a fine point. All Faber-Castell pencils are SV Bonded. SV Bonding is a Faber-Castell trademark.
They hardly ever need sharpening and when they are dropped the leads do NOT break inside. They are more expensive to purchase than other brands but well worth the price as you do not sharpen them very often and the leads do not break. In fact I have had a set for Sir N which he uses often and I sharpened them for the first time yesterday.