... hand Light Steel Keel Clamp(hand tools)1) Adopt the precise casting of high quality carbon steel with novelty ... operators.2) The plunger adopts special alloy steel,applies sin curve cutting,firm and reliable engagement ... for the fixation and connection of various light steel keels with wall thickness 0.5mm-0.8mm ... , GS, SGS, ISO9001 conformity certifications. hand tools Single-hand Light Steel Keel Clamp