The 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.