The Mini Quick Release Adapter brings reliability at a great price.  The upper section has 1/4"& 3/8" thread holes; the 3/8" thread hole comes with ARRI Location Pin holes to prevent turning loose.  The lower section has a 3/8" thread hole. It also fits with the ARRI Anti Twist Adapter Plate, the ARRI Anti Twist Plate 90° Version, the SmallHD Anti Twist Adapter Plate & SmallHD Anti Twist Plate 90° Version (which are sold separately).

Stainless Steel Screws included:

2x 3/8" (12.5 & 9.5 mm length ) 
2x 1/4" (12.5 & 9.5 mm length ) 

The Lever is black and easy to change; coloured levers sold separately.