Milescraft 1338 Lock Mate PLUS – Self Clamping, Professional Door Lock Installation Kit, Door Lock Jig for Wood/Metal Doors with 1-3/8” and 1-3/4” Thickness. Bi-Metal Cobalt Hole Saws Included

Selected the Milescraft door knob installation jig over the many other alternatives mainly because of the metal sleeve inside the 2 1/8" hole guide, plus overall favorable reviews. Used this to re-drill and install new door knob sets in eight doors with the old style door knobs with the smaller holes. The Milescraft kit worked great, the guide clamped very firmly to the doors, never slipped and didn't mar the door paint which was < 2 weeks old. There was no wear on the inside of the jig even after drilling eight holes. The supplied hole saws worked fine, no issues at all. I only used on wooden 1 3/8" interior residential doors, so cannot comment on suitability for oak or metal doors. 100% satisfied - would recommend without hesitation.To save time doing multiple doors I purchased a second arbor to eliminate hole saw blade changes (JIECHENG Bi-Metal Hole Saw Arbor Mandrel 3/8" Hex Shank with High Grade Pilot Drill bit worked great for the Milescraft 2 1/8" hole saw).

Very cool tool to use

This was a great jig that got the work done. I chose this Milescraft model over Ryobi or Irwin because this one has a metal circle around the area you drill. It seems durable and was easy to use as long as you triple check your measurements. Also follow instructions to drill from the opposite side after the lead bit barely comes through.Only complaint was the hole saw bits were not superb, but they did the job on the one door I needed. I'm confident they can do many more doors, but as someone familiar with drill bits, I was not impressed by their quality.

This was a replacement for a cheap set I bought at a big box store. It wore out and broke after 3 lock sets. This seems to be a lot better quality. The clamping system is great and easy to use. Love the spacer tool for boring out the deadbolt. Would be nice if it had a template for routing out the strike plate.

The jig clamped securely to the door and made matching the holes a snap. The metal inserts make it feel more sturdy also. The hole saws were of good quality although having used them once I cannot speak to durability. I had to widen the hole for the knob as there was already a knob but no deadbolt on this door. The old hardware was smaller than new stuff so I had to solve that issue and using the smaller hole saw to line up the jig worked great. I was afraid that it would not work as well since I wouldn’t see the pilot hole and just had to go all the way through from one side. The saw and jig did great and I didn’t have a jagged exit on the other side. FWIW it was a wooden door. The only difficulty, and this is not unusual of this kind of hole saw, is that getting them off the adapter is tough. I hit the thing with penetrating oil and it helped but the adapter for larger one is pretty stuck. Fortunately that doesn’t keep you from getting the smaller one on the pilot drill and the smaller one is easier to remove. If you need to install door hardware, this kit is well worth it.

Only draw back is the pre drill holes on the face is needed for the lock tongue

Works great. Very well made. Accurate. The hole saws were sharp and worked quickly. Brackets were not scratched much by repeated use. I used another brand of this type of kit last year and it was destroyed after just a few doors. This brand worked great. If you are going to do a lot of doors (more than 5), you can save time by getting two of these kits. Put the small hole saw on one drill, put the large hole saw on another. It’s worth the expense, believe me.

The concept is good, the clamp holds. However, because the plastic is flimsy, the guide tends to deform & cause the hole saw to not drill straight. The result is lightly misaligned holes, or a hole that is slightly off from one side of the door to the other.