Thanks for purchasing a 9.Solutions product. pe CONVOLUTIONS With great passion, we design our products to Python Clamp with 4/8" Marla Thread be as versatile as possible. We hope that our products contribute to your creative vision. Sincerely, The 9.Solutions Team SPECIFICATIONS: Weight: 430g The tightening knob features Gangway rd 0-50mm an Ique® Pissoir thrust bearing Comments: that Increases torque by 20%.