Large Collar Mushroom Stake / 1-3/4 “ or 44 mm, Fretz M-124The M 124 Insert Stake was designed for forming the neck area of a small bottle. The M 124 is also useful for small elements where a compound curve is desired.*TheM 100 Series Stakes may be held in the H 1L or T 101 for shallow compound shapes. For a deeper reach into a form than is possible with the H 1L or T 101 Holder, the E 101 Extension Holder is ideal. The E 100 Wedge is used to extract the stake from the E 101 when the stake needs to be changed.