All kits are of American-made version. Please refer to the photo and the description for each kit detailed below. Please note that, unless noted otherwise, most kits for the pear-shaped ratchets are for the newer version. The mounting screws are going through the body and threading into the cover plate. See first photo for reference.
01 MRRK-A.....Complete kit; for 1/4" drive MR5 and its flex head or long handle variations
02 MRRK-A.....Gear, pawl, spring, and cover plate only; for 1/4" drive MR5 and its flex head or long handle variations
03 MRRK-A.....Gear and cover plate only; for 1/4" drive MR5 and its flex head or long handle variations
04 (P/N Unknown).....Kit looks like it's for the MR5 ratchet. However, the gear does not fit the MR5 head. Gear has 24 teeth instead of 30
05 XRMRK-A.....Complete kit; for 1/4" drive MR5 ratchet with 3/8" drive head (this kit turns the regular MR5 into a 3/8" drive)
06 XRMRK-A.....Complete kit; for 1/4" drive MR5 ratchet with 3/8" drive head (this kit turns the regular MR5 into a 3/8" drive)
07 XRRK-A.....Complete kit; for 3/8" drive XR8, XR11, XR12, XR13, and their flex head variations
08 XRRK-A.....No screws; for 3/8" drive XR8, XR11, XR12, XR13, and their flex head variations
09 XRIKR.....Complete kit; similar to XRRK-A but comes with two shorter springs
10 RK-MRR.....Complete kit; for MRR3, MRR5, MRR6F, MRR7, and MRR7PA ratchets
11 VRRK-A.....Complete kit; for 1/2" drive VR10, VR11, VR15, VR17, VR18, and their flex head variations
12 XRRK-A.....Complete kit; for 3/8" drive XR8, XR11, XR12, XR13, and their flex head variations. Pawl has slight manufacturer blemish on outer edge. Does not affect functionality. See close-up.
13 XRRK-AF.....No cover plate; Gear, pawl, spring, ball, lever, and screw for lever only ; for 3/8" drive XR8, XR11, XR12, XR13, and their flex head variations
14 XRRK-A (USED).....Complete kit; for 3/8" drive XR8, XR11, XR12, XR13, and their flex head variations. This is a USED KIT from an older XR11 with older style Torx head screws. Minor wear and tear. In good working order.
15 MDM.....Head assembly only; no snap ring; for 1/4" drive MRR3, MRR5, MRR6F, MRR7, and MRR7PA ratchets
16 MRRK.....Complete kit; for early-type 1/4" drive MR5 ratchet with mounting screws going through the plate and threading into the body; see example
17 MRRK-AF.....Complete kit (no cover plate "AF" version); for 1/4" drive MR5 and its flex head or long handle variations
18 MRRK-AF.....Complete kit (no cover plate "AF" version); for 1/4" drive MPR5 ratchet; see example
19 AR4RKA.....Appear used; compatible ratchets unknown; see actual kit for reference
20 XRMRK-A.....Complete kit; for 1/4" drive XR5M and XR5MK ratchets; i.e. MR5 ratchet with 3/8" drive head (this kit turns the regular MR5 into a 3/8" drive)
21 XRMRK-A.....Complete kit; for 1/4" drive XR5M and XR5MK ratchets; i.e. MR5 ratchet with 3/8" drive head (this kit turns the regular MR5 into a 3/8" drive)
22 RK-XMRR.....Complete kit; for XRR5M and XRRMS ratchets; i.e. 3/8" drive gear that fits in a 1/4" drive body such as MRR3, MRR5, MRR6F, MRR7, etc
23 RK-XRR.....Complete kit; for XRR11 ratchet
24 XRRK-AF.....No
cover plate; Gear, pawl, spring, ball, lever, and screws (Torx head) ;
for 3/8" drive XR8, XR11, XR12, XR13, and their flex head variations
25 R1A-159.....Appear used; compatible ratchets unknown; see actual kit for reference
26 TWX-RK.....Complete kit; for TWX series torque wrenches TWX 80, TWX100, and TWX100FC; see example
27 XRFBS
28 MRBK
29 XRC
30 XRRK-A.....Complete kit; for 3/8" drive XR8, XR11, XR12, XR13, and their flex head variations
31 VRRK-A.....Complete kit; for 1/2" drive VR10, VR11, VR15, VR17, VR18, and their flex head variations
32 Cover Plate for 1/4" drive ratchet MR5/MR5K; new old stock
33 Cover Plate for 1/4" drive ratchet MR5/MR5K; used
34 Cover Plate for 1/4" drive ratchet MR5 early-type (for mounting screws that are going through the plate and threading into the body); used
35 Cover plate for 3/8" drive ratchets XR8, XR11, XR12, XR13, and their flex head variations; new old stock
36
Cover Plate for 1/4" drive ratchet MR5 early-type (for mounting screws
that are going through the plate and threading into the body); used