The KregJig has the following features. It is simple to use and it will not take long for you to become a pro.
1/ The drill bit guide. This is set to the thickness of the board in to which the holes will be drilled. Most of the time it will be set to 3/4″.
2/ The clamp which hold the board to be drilled in place.
3/ Three holes that guide the drill to form a hole in the wood at a 15 degree angle.
4/ A guide for adjusting the position of the collar on the step drill bit
5/ The pin lock which secures the pocket hole guide.
6/ The specialized drill bit which simultaneously drills a pilot hole and the clearance hole for the screw head.
7/ The Allen key is used to tighten the collar.
8/ The specialized screw has flat head that which stops at the narrow width of the hole and hold the two boards tight in place.
9/ The square driver bit. This bit has a square tip to accommodate the screw head. The length is required to drive the screw in to the depth of the hole.