So as some of you know the company that makes Matco (Danaher) also makes Gearwrench and Armstrong. Any of the GW or Armstrong 60 tooth ratchets without a quick release will accept Matco 88 guts. I have this in my 3/8" GW 81211 ratchet for work because I don't want testing fluid all over my good tools. I don't use my 1/2" or 1/4' at work and they are real Matco 88s anyway but I do know that they will work in 1/4" and 1/2" Danaher ratchets. The part number for the 3/8" kit is BFR8TK and your Matco guy should have them on his truck for about $20.