Check the listing for details. RAM-201-SU RAM Double Socket Arm with RAM Pin-Lock Secur.... Color: Black, Condition: New. Listed at 44.94 USD. RAM Double Socket Arm with RAM Pin-Lock Secur... RAM-201-SU Genuine RAM Products! The RAM-201-SU consists of a 1.5 INCHES dia. ball compatible STANDARD LENGTH double socket arm, mixed combination Pin-Lock security nut and key knob. RAM Pin-Lock security solutions are designed to withstand the harshest environments where RAM Mounts are commonly used. With an emphasis on aesthetics and function, RAM security nuts/knobs are low profile and only add a small amount of additional bulk to your system when compared to the standard knob included. At a fraction of the cost of currently available keyed locking knobs, the additional peace of mind and tamper resistance comes at a very affordable price.hardware included (1) Pin-Lock Security Keyproduct dimensions Overall Length: 5.69 INCHES socket to socket length 4.66 INCHES ball size C Size (1.5 INCHES )weight capacity Standard Use: 4 lbsHeavy-Duty Use: 3 lbsmaterials Marine-grade aluminumpackaging type Poly BagWeight 0.85 lb hardware included (1) Pin-Lock Security Key product dimensions Overall Length: 5.69 INCHES socket to socket length 4.66 INCHES ball size C Size (1.5 INCHES ) weight capacity Standard Use: 4 lbsHeavy-Duty Use: 3 lbs materials Marine-grade aluminum packaging type Poly Bag Weight 0.85 lb