Description:--This heavy duty linear actuator is perfect for operating tonneau covers, motorized trunks &hoods, amp racks and whatever else you may imagine!--This actuator has a & Static Load& rating of 200 lbs. This is the weight that the structure can support. The & Dynamic Load& rating is 112 lbs. This is the weight that the device can push, pull or lift. --Built-in adjustable limit switch allows for custom run from 0-2 inches--10:1 Gear Ratio for fast operation--Built in clutch prevents damage from overextension.High torque motor.Permanently lubricated sealed shaft--12 Volt DC, 10 INCH; Extension.--Retracted length: 19"(475mm) --Extended length: 29"(725mm) --Diameter of Mounting hole: 5/16"(8mm) --Diameter of Shaft: 0.79"(20mm)--225 Pound Max Lift. --Speed: 12mm cond.--Wiring included, pre-installed. --Built-in clutch prevents over-extending and over-compressing.--Professional Installation is Highly Recommended (No Instruction and Wiring Diagram Included)--Comes with all items in the picture.