Sog TWI-22 Twitch XL - Black Handle. The XL is classy...it moves well, looks right, walks the walk, and talks the talk. It is not just a larger version of a Twitch. It is serious business that can more than get the job done. This is a high-tech statement of sophistication with all the bells and whistles that you expect from the designers at SOG, including our SOG Assisted Technology™. The fine construction comes together to make the XL one of the most practical and beautiful knives that we have ever handled.