Width of cut for PSA-G8 is bigger and sharp blades of pruning shears. And die-cast aluminium makes handle tough and strong.PS-20R is superlight-weight(160g) pruning shears.PST-8 blade makes sharp cut and the reinforcing rib is given near the rivet to enhance strengh.PS-8PLUS-R blade opens more widely than PS-8 series. TS-66B cuts flowers and small branches easily. Also PS-7,8 and PSB-8G CS are nothing like other pruning shears.These series have a lot of features. Colorful grip makes hard to get lost. Soft cushion guards hands from shock.Spare blade is enviroment friendly and economical.