Primaris magnets: MEALOS Magnets - 300 Tiny Magnets... https://www.amazon.com/dp/B08NZSL2V6?ref=ppx_pop_mob_ap_share

I was worried about two things: size and strength. The places I was planning on putting the magnets were SO small. If I got really small magnets, were they going to be strong enough to support the weapon? I ended up getting 300pcs 3x1mm Magnets - MEALOS Tiny Magnets - Mini Magnets Small Round Magnets through Amazon.

(https://www.amazon.com/gp/product/B08NZSL2V6/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1)

The Spirit of the Mountain two handed hammer works REALLY well. The Avalenor double hammers are a little wonky, but I can make them work.

Neodymium magnets come in millimeters. Go to Amazon and search for "5x1 magnet" and you will find a large choice of magnets. The measurements are width x depth. When I first started I used 5x1 for everything. Older 25 mm bases are only 2 mm deep so I used 2 magnets on those, and 3 magnet on the 3 mm deep bigger bases. I realized that 5x3 are a much more economical option for the bigger deeper bases. For arms, weapons, etc. I like 3x1, anything smaller is too weak to hold the arm or weapon. I bought a random pack from my FLGS, and realized I paid WAY too much, now I only buy from amazon, I have used about 300 magnets. My cheap project was more than I expected.

These are the two I bought most recently

5x3 https://www.amazon.com/dp/B08M3H4VP5/ref=cm_sw_r_cp_apa_i_Q0Z0SJZDFKYJ7VA0RCRG?_encoding=UTF8&psc=1

3x1 https://www.amazon.com/dp/B08NZSL2V6/ref=cm_sw_r_cp_apa_i_EAG97AHW3VG3E6CWR4QD?_encoding=UTF8&psc=1