Part# 01-011


Tunnel locking springs are used to restrain cartridges and explosives in holes during tunneling operations. MTi GROUP's SPRINGLOCK tunnel spider will keep charge at the toe of the hole to maximize fragmentation, particularly when holes are angled. Classified as a stemming device in some countries, the locking spring is an economical and productive method to stem holes. The locking springs are made from a rigid plastic and are shaped for easy insertion. Used mainly in civil and mining projects where drill hole size is 45 – 50mm, they are designed to go in but not come out.


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45 – 50mm, 1500/box