Rescue a old knife and her caps ...
a old Knife (shure) without cover,cauthchu,pvc electrical tube,magnet from a HS hdd,copper wire(rigid)
Step 2: How To
Turn around the handle with the copper wire(spiral mode) and stop it with the Caoutchouc.
It's rigid and sure in all conditions.
In the hot water for the 3 minutes,the Pvc tube is ready to mashed (plate),then join de rubber protection and