If you are having problems putting the slider on your coil zipper, here is a progression of pictures to help you quickly apply the slider onto your tape.
Notice that I took an inexpensive fork & bent it at an angle (just used my fingers). Vise was a .50 garage sale find. Orange clamp is from my local Downtown Ace & it is the $3.00 & 4" long wood clamp.
Pull the tynes of the fork apart so that the zipper head will fit between. Zipper head is UPSIDE down. Then the tape is opened about 2" & is UPSIDE down.