The Op/Tech Pro Strap is ideal for photographers who use large cameras with long heavy lenses. The patented weight reduction system makes equipment instantly feels 50% lighter and 100% more comfortable. Weight is evenly dispersed while the strap functions as a shock absorber to eliminate neck and shoulder fatigue. Non-Slip Grip enables camera gear to be safely carried slung over the shoulder. Uses 3/8-inch (9.5mm) connectors.