These are seriously well made clamps. Aluminum and stainless steel construction keeps them light at around 125 grams each while still feeling solid in the hand. The jaws open up to 60mm, which is wide enough to grab onto most rails, pipes, table edges, and light stands without any adapter gymnastics. Ten 1/4" thread holes spread across the body give you a lot of flexibility for positioning accessories, and the non-slip rubber pads inside the jaws grip whatever you clamp onto without marring the surface. That last part matters more than people realize until they've had a cheaper clamp chew up a light stand or leave rubber marks on a finished railing.

Threw a heavy camera on one just to see how it handled the load and it held firm with zero movement or creep. Rated to 2kg, which covers most mirrorless bodies and a good number of DSLRs. The T-bar locking knob tightens down quickly and holds position without needing to crank it, which is exactly what you want when you're trying to dial in a shot and don't have a free hand to fight with a stubborn clamp. Grabbed onto every surface I tried without any slipping and gave my magic arm a solid foundation. Two in a pack, and these are now the default clamps in the bag going forward. These K&F clamps have earned their spot in my bag.