This speaker pole adaptor is very strong. Will never bend, break or separate, a little on the heavy side too, but speaker pole equip needs to be this way.
My 2 sub bass speakers have this m20 thread on top, my mid/highs sit right onto this 35mm boss perfectly and stay there, without moving at all for 6 hours, be it 5 piece r & r band or 4kw per side disco.
I tried short poles, but find some mid rangefrequency cancellation because of "hard physical state", so rubber feet or rubber mat & this adaptor helps keep a full sound spectrum.