Able to extend the length of 10-105mm extension rod by assembly,Very easy to use
Length 10 mm: 10mm long,
Length 15 mm: 15mm long,
Length 20 mm: 20mm long,
Length 25 mm: 10+15=25mm long,
Length 30 mm: 30mm long,
Length 35 mm: 15+20=35mm long,
Length 40 mm: 40mm long,
Length 45 mm: 15+30=45mm long,
Length 50 mm: 20+30=50mm long,
Length 55 mm: 15+40=55mm long,
Length 60 mm: 20+40=60mm long,
Length 65 mm: 10+15+40=65mm long,
Length 70 mm: 30+40=70mm long,
Length 75 mm: 15+20+40=75mm long,
Length 80 mm: 10+30+40=80mm long,
Length 85 mm: 15+30+40=85mm long,
Length 90 mm: 20+30+40=90mm long,
Length 95 mm: 10+15+30+40=95mm long,
Length 100 mm: 10+20+30+40=100 long,
Length 105 mm: 15+20+30+40=105mm long.
SUXING focuses on measuring instruments.