IMAGE Blades Free Tape Professional Nursery Grafting Tool Knife Tree Pruner 2 Extra Bla, Red Easy to use. Make omega style grafts. Cut grafting stock from 5mm up to 1.4cm in diameter. Blades made from SK5 high carbon steel - stays shaper for longer Trimming blades 3 mm thick - suitable for triming medium to small branches Blades hard chrome coated - provides protection from rust.