This is a worm-drive hose clamp. It is lined to protect your hoses from being cut by slots in the band. The band is constructed of 301 Stainless Steel with a 305 Stainless Steel Screw. The operational temperature range for this clamp is -40 degree to 800 degree F. Clamp can be tightened up to 35 in-lbs using a screwdriver or a 5/16" socket. The band is 9/16" wide with a thickness of .022". This clamp will fastened hoses for 4.0" tubing.