Whirlwind connectors combine quality with ease of use. These Whirlwind chassis connectors all mount into the same Switchcraft "D" female hole punch which greatly simplifies layout and configuration of panels. Chassis connectors with nylon composite bezels are available with colored shells and can be heat-stamped with white numbers or letters. The XLR-M, XLR-F with metal bezels are available in black only and can be laser engraved.