This DK05 drilling kit is used to drill holes on round bars. It can ride on the round bar, with it you can drill the holes on the round bars conveniently. The anodized aluminum alloy kit body provides wear-resistant, rust-proof and long life. The kit includes 5 stainless steel drilling sleeves with sizes 6/7/8/9/10mm. You also can use DK05 to drill the holes on 90° corner.