There are links for tools in this video.
Solid Contact for the Harley Caterpiller Hand Tools is 14,16,20.
The crimping tool's applied force transfers through four curves in the head of the right plier handle to the four indenters.The four intenders do a centripetal linear motion that makes their front-end teeth crimp the contact.The consistency of impression and crimping quality is assured by the cycle controlled precision ratchet.
2.The handles should be squeezed together.The handle will return to its original position.