[M10 (10 mm)] I'm using it with a Robus RC-5570 Vantage Series 3 Carbon Fiber Tripod, a Nodal Ninja Ultimate M2 panoramic head and Phase One XF camera system. Everything works very well.

[0.615 lb] These spikes are awesome in rocks and especially when photographing in creek beds. They've held very well for me and they're fairly easy to clean. Occasionally it takes a small brush to get dirt out of the threads before screwing the rubber caps back on but nothing out of the ordinary.

[Steel] A definite must for low tripod setups.

[M10 (10 mm)] Used mate my camera having a 1/4 -20 thread with a tripod head having a 3/8 thread. Works well because the base is quite wide forming a platform for the camera to be attached to. My setup,is quite heavy, so the thickness of the base is not a problem

[Steel] The listing for this item is a little confusing, but this is the 75mm ball for the Sirui BCT-2203 and similar tripods. It does not come with the adapter ring pictured in the product photo. Great build quality, fit and finish. I really like the weight saving cut-outs (nice touch). Id highly recommend.

[0.615 lb] Screws firmly to the tripod base place, no wobble and the 1/4 male mount does the same. Good value too.

[0.615 lb] I recently got a great Manfrotto tripod as a gift, but I soon realized that the thread size on the tripod (3/8-16) was too big for my Canon 6D camera (1/4-20). Surprisingly, this adapter was one of the few thread reducers I could find for these specific sizes, and it's perfect for the job. It feels well made--the disc is metal (no cheap plastic), so it has some heft. I just screwed it onto my Manfrotto tripod head and leave it there, and my camera is very securely fastened to the tripod when attached to the reducer. Would definitely recommend.

[M10 (10 mm)] I have similar 75mm leveling balls from Manfrotto and Induro, but this Sirui is much higher quality machining and feels more solid. It has a larger diameter top plate, which may be helpful in case you have a larger video head. I particularly like the very positive flared-out tightening grip. The B&H product descriptions for this unit versus the similar Sirui Y-75B are very confusing. The product photo calls this one a leveling ball set and shows it with a bowl; the Y-75B is seven dollars less, is called just a leveling ball and does not show a bowl in the photo. THE RX75B ALSO DOES NOT COME WITH A BOWL FOR THE SIRUI RX TRIPODS! I contacted B&H who were not able to explain the difference to me, then contacted Argraph (the US distributor for Sirui) and was told the RX75B is the newer design with some improvements, is not intended to come with the bowl, and the Y75B would be discontinued in the future. I am completely happy with the unit and did not return it despite this confusion.

[0.615 lb] Setting up a tripod on uneven ground is made super easy with the levelling ball set.

[0.615 lb] Excellent product, using it on an AR 3204 with no issues. Two more feet of height is well worn the cost.