Square head 14 - protrusion 11,5 mm. Use tapered punch BOUT1
For soft and slippery ground, snow. Shoe thickness 8 or 10mm. Square head 14 mm wrench, protrusion : 11.5 mm out of the shoe. Tapered shank with big diameter 9.5 mm, drill Ø 8.5 mm and use tapered punch ref. BOUT1. Weight 18 g.