This DK03 self-centered drilling kit is used to drill 6/8/10mm holes in the middle of workpieces, clamp range is 16-60mm. The anodized aluminum alloy kit body provides wear-resistant, rust-proof and long life. The kit includes 3 hardened drilling sleeves for each size, total 9 pcs. The brass positioning pin has 4 steps, providing convenient positioning. Use it to make accurate drilling!