Have a love/ hate relationship with these. Construction is top notch. Well made, easy to fill and adjust weight. I have a 100lbs, 150, and just upgraded to the 200lbs. Fill them then toss em around a bit and top off! These things will make you sore and hopefully strong as an ox! Great company and fast shipping. Great service. Gave lots of tips for how to fill and program. My go to for sandbags.