7/8 Drill Bit for TRE Adapter High speed;Steel;1/2 shank drill bit;7/8 bit used for drilling out the JK knuckle to install the 8001-03-01 Drag Link Flip Adapter;Made in the USA Synergy Manufacturing Synergy Manufacturing 7/8 Inch Drill Bit for TRE Adapter - 2228379 8001-02-02 Drill Bits