Method of forming a wearable surface of a body

A method of forming a wearable surface of a body sized and configured to comminute material comprising:

• providing a first metal structure, the first metal structure having a first portion, a second portion and a third portion positioned between the first and second portions;
• positioning at least one first insert in the first portion of the first metal structure at a first depth;
• positioning at least one second insert in the second portion of the first metal structure at a second depth;
• positioning at least one third insert in the third portion of the first metal structure at a third depth;
• the third depth being different than at least one of the first depth and the second depth or the first depth being different than at least one of the second depth and the third depth;
• positioning a second metal structure adjacent to the first metal structure such that a gap is formed between the first metal structure and the second metal structure, the second metal structure having a first side facing toward the gap and the first metal structure and the second metal structure having a second side opposite the first side;
• positioning at least one explosive material adjacent to the second side of the second metal structure;
• igniting the at least one explosive material to attach the at least one first insert, the at least one second insert and the at least one third insert to the first metal structure;
• and
• removing material from at least one of the first portion of the first metal structure, the second portion of the first metal structure, the third portion of the first metal structure, and the second metal structure to shape a wearable surface of a crushing body.