Use hinge as template by drilling directly through the holes. Spring-loaded sleeve has a chamfered tip to position centrally in hole. 1/4"Hex shank. Features & Benefits: • Use hinge as template by drilling directly through the holes. • Spring-loaded sleeve has a chamfered tip to position centrally in hole. • Replace worn drill bits by undoing hex head screw on side. • Contents: Hinge Drill Bits; 7/64" x 87mm, 9/64" x 98mm, 11/64" x 98mm, 2.5mm hex key. • 1/4"Hex shank. • Model No. AK3HD Specifications: Model No AK3HD Brand: Sealey Contents: Hinge Drill Bits; 7/64" x 87mm, 9/64" x 98mm, 11/64" x 98mm, 2.5mm Hex Key Nett Weight: 0.10kg Replacement Parts: N/A