All collars are not created equal. Melfred Borzall’s collars for Ditch Witch and Vermeer Quick-Disconnects have a thicker wall for more strength and longer life. Choose from collar options with chunky carbide hardfacing, carbide button studs, or even carbide cutter teeth to actually enlarge the hole during pullback. Collars with cutter teeth are part of the FastBack System to accelerate your direct pullback operations.