'Bison Tools' are Sharp Tools, and they prefer one Trim on a 'slow' Wheel, and have Clay Leather Hard. If you are not used to them, consider to touch the 'heel' of the Cutter just slightly first, and bring the Handle over a little to begin to cut. The 'heel' is the far side of the bevel as is away from the cutting edge.

An illustration of the 'cross-section' of a Loop:

Trimming with Sharp Tools as 'cut' requires different habits than Trimming with Dull Tools. Many Potters are used to trimming with Dull Tools and have a habit of Trimming on a fast Wheel and with wet Clay, as the Tools they are used to will not cut Leather-Hard very well. 'Chattering' may be had with a FAST Wheel and gummy Clay, and is not likely otherwise.

The BISON Tools come Sharp and hold their edge for a long time. Please consider to use them knowingly; with a Slow Wheel, and when possible let your Clay be toward Leather-Hard. Thus will your Work go sure and swift and clean.