DUB-508 Std Right Angle Ball Wrch .050 PDF Print $1.85 SKU: DUB-508 DUB-508 Std Right Angle Ball Wrch .050 Add to Wishlist Add to Compare Back to: Du-Bro Products Description This is a .050 Right Angle Ball Wrench (4-40 Set Screw) from Dubro. FEATURES: Fits 4-40 set screw.