310mm Hand Riveter-BT801 1、Innovation patented structure 2、Max multiple of arm force 30 3、Delicate shape, ergonomic hand 4、Length:310mm(12") 5、Weight:860g 6、Max working stroke: 9mm 7、Max effective working stroke: 7mm 1470g Hand Riveter-BT808 1、Innovation patented structure 2、Max multiple of arm force 56 3、Delicate shape, ergonomic hand 4、Weight: 1470g 5、Working stroke: 9mm