Just buy an
extender stop wasting time and energy on stupid things when there is already really cheap
extenders on the market. You can purchase an
extender for around $150 and it will last you forever. If you are not willing to invest $150 to your penis, you are not serious about increasing the size.
If you want to make a home made
extender use your hands, it's that simple. I do NOT recommend making your own
extender, this would be stupid and dangerous to your penis not to mention probably be more expensive than actually purchasing one from a trusted company.