ZAFortLign Heavy Duty Upgraded Patio Umbrella Clamp Clip Steel Umbrella Stand Holder Mount Upgraded and heavy duty umbrella clamp attach to bleachers, benches, tailgates, boats, poles, boats, fences and more; 360 degree rotable function allows you to adjust umbrella position easily; Provides cool shade for you to enjoy time with your family, ideal for fishing, camping, outdoor activities & watching sport games etc. Meanwhile compact and perfectly portable, easy to take along anywhere you go for instant shade.