SH Single Complete Clamp for Weld Mounting Consists of: 2 HEX Bolts 1 SCP Cover Plate 1 CLH Clamp Set (2 halves) 1 SWP Weld Plate DH Double Complete Clamp for Weld Mounting Consists of: 4 HEX Bolts 1 DCP Cover Plate 2 CLH Clamp Sets (4 halves) 1 DWP Weld Plate R7H R8H Single Complete Clamp for Rail Mounting Consists of: 2 HEX Bolts 1 SCP Cover Plate 1 CLH Clamp Set (2 halves) 2 RCN Rail Nuts R9H Single Complete Clamp for Rail Mounting Group H7 Only Consists of: 2 HEX Bolts 1 SCP Cover Plate 1 CLH Clamp Set (2 halves) 1 SPL Spacer Plate 2 RCN-9 Rail Nuts HSK Complete Stacking Kit Consists of: 2 STB Stacking Bolts 1 SAF Safety Plate 1 CLH Clamp Set (2 halves) UH Single Clamp for Strut Mounting Consists of: 2 HEX Bolts 1 SCP Cover Plate 1 CLH Clamp Set (2 halves) 2 UCN Strut Nuts