When I started coiling I used a mini screwdriver, then a 2 mm drill bit ,went on to try a M3 bolt then tried a Mandral, after that I bought GREGSTERS coiling Buddy, next came the Creative coiling gizmo, all of which I used a blow torch to squeeze the coils together. Finally discovered the new wave of coilers and have settled on the KURO Coiler. This Vaping lark is a cash cow, but I love it.