Quick release pin allows the snap bail to be released, even under tension. The detail size refer to the picure. The maximum working load is 1000lbs. Safe working load depends on application and orientation of the shackle under load. Made out of premium 316 stainless steel to drastically reduce wear and corrosion. Widely used for hoisting, wire rope, diving, surfing, outdoor survival, ropes hung a quick discharging, etc. Kindly Note: Safe working load , Working under Load Limit. Do not use to lift people.