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The Stemlocker duplicates crushed rock stemming with no special tools or placement... just drop it in the hole.
Independent tests with a high speed camera shows energy retention and better crater formation
The Stemlocker is a heavy, specially constructed, plastic ball used to improve the effectiveness of the stemming. It is not a substitute for good stemming practices but if used properly will help prevent stemming ejection and improve results.
To use, put one quarter (1/4) of the total stemming in the hole, drop the ball on top of this and then put in the rest of the stemming. By doing this, the ball acts as a plug for both the explosive force trying to bypass the ball and by forcing the ball up into the stemming on top of it. It is a double acting plug that has been shown by high speed cameras to effectively improve results.
At present, we manufacture
one size -- 2.75" for use in 3" and 3.5"
holes.
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