Apex SF-5330 | Inch Hex | 6-Point | Surface Drive | Extra-Long Length | 1/2" Square Drive | 15/16" Hex Power Socket Current Control You can also combine spacers

You can also combine spacers to reach the desired rail width

Without 12V Battery

Apex 3609 Square Nut 4-Point Standard Length 3/8" Square Drive 9/32" Square Impact Socket

Bondhus 16468 HEX END T-HANDLE SINGLES

Apex SF-5330 | Inch Hex | 6-Point | Surface Drive | Extra-Long Length | 1/2" Square Drive | 15/16" Hex Power Socket Current Control You can also combine spacersApex SF 5330 Inch Hex 6 Point Surface Drive Extra Long Length 1 2" Square Drive 15 16" Hex Power Socket Tool Side Drive Size: 1 2" Square Drive Fastener Side Drive Size: 15 16" Hex Socket Overall Length (OAL): 3. 5" (88. 9mm) Features Impact Rated; Meets or Exceeds Proof Torque Requirement for Impact Standard ASME B107. 112 High Carbon Alloy Steel and Proprietary Heat Treat Process Yields Greater Strength and Longer Life Cutting edge Machining Process