... agility, and this greatly reduced work intension.2.HS-VT series manual chain hoist block Gear : innovated ... are more wearable and steadier,and more laborsaving.3.HS-VT series manual chain hoist block Chain : ... using newy desing,weight will never escape.5.HS-VT series manual chain hoist block Limit Switch ... alloy steel,with high precision and security.6. HS-VT series manual chain hoist block Encloser:made ...