Pre-Crimped Leads Molex Pre-Crimped Leads are a simple and cost-effective solution for any pre-production or prototype requirements. They are available in female-to-female and male-to-male configurations with lengths of 75mm to 600mm. All pre-crimped leads are fully tested and available for the most popular Molex connector families. The leads are crimped on both ends, enabling use in wire-to-wire applications. The leads can also be cut for use in wire-to-board applications.