“What is Pocket Hole Joinery / Pocket-Screw Joinery?” Using the pocket hole jig to drill at an angle of 15 degrees into one work piece, and then joining it to a second work piece with a corresponding length screw. MulWark Premium Jig System Set, a set includes most needs you require during pocket-hole joinery and help you to build a strong joint, for your repairing or creation. Set includes 1* Two-Holes Jig 1* Depth Stop Collar 1* 1/8" (3mm) Allen Wrench 1* 6" L (150mm) No.2 Robertson Square Driver Bit 1* 1/4" Stepped Drill Bit 10* Plastic plugs 10* #7 1" Coarse Square Driver Screws 10* #8 1-1/4" Coarse Square Driver Screws 10* #8 1-1/2" Coarse Square Driver Screws 10* #8 2" Coarse Square Driver Screws 10* #8 2-1/2" Coarse Square Driver Screws 1* User Manual 1* Case