The patented automatic self-centering action of these dowel jigs assures accurate center drilling every time, even on round objects. Large steel clamping screw tightens the tool like a vise, with rugged aluminum sides holding work securely without damage to the wood. Large 2" to 2-7/16" capacity on all models will handle most size requirements. Drill guide centers are hardened, guide holes are precision drilled and reamed for extreme accuracy. USA.
Features:

• Self Centering
• Includes 2 each size bushing 1/4, 5/16,and 3/8
• 2-3/8 wide capacity
• Made from aircraft grade aluminum
• Steel plated for corrosion prevention