Jig for 300mm Flat Jack

Flat Jacks - Jig for 300mm Flat Jack, Jig for 450 mm Flat Jack

It is a frame made of mild steel to serve as a guide for cutting the slot and drilling holes for gauge points. This ensures accuracy for positioning and alignment of holes to be drilled in the rock faces both for slot and gauge points.

but suitable for use with 450 mm x 450 mm square flat jack.