This is the Genuine Deutsch Mil / Solid Contact Crimper, HDT-48-00 [ HDT4800 ] also sold as Harley Davidson tool HD-42879.
This eight indent hand crimper works with the the Solid Deutsch contacts in sizes 20 – 12 (24 AWG – 12 AWG) for most Deutsch series including DT, DTM, DTP, DTHD, HDP, Jiffy splices and many others.
Thru 5/6 take $30 off this crimp tool with coupon code 4HDT