2. cut a square hole 10 centimeters long, bring to fit all 2 hole sleeve, making room for 2 pieces.3. prepare a secondary ring nut and all 8 2 hole diameter and steel.Knot
2. Cutting scene 10 centimeters long to fit in the hole, the second hole with armrests made two-piece nut and washer 3. Prepare all eight holes and two steel lines knots.